The occasional development of wings is probably of service to the species in enabling the insects to reach new fresh-water breeding-grounds. Nevertheless, as explained below, it seems to be highly probable that ant-imitating insects and spiders, when the resemblance is dependent to a greater extent upon size, shape and movement than upon tint, have acquired their mimetic likeness especially to protect them from the attacks of such insect-enemies as predaceous wasps of the family Pompilidae, flies of the family Asilidae, and from socalled parasitic hymenoptera of the family Ichneumonidae, as well as from other insect-eating Arthropods. As the light faded from the treetops, the birds grew silent and insects began their orchestra of night sounds. Graceful in form and active in motion, sun-birds flit from flower to flower, feeding on small insects which are attracted by the nectar and on the nectar itself; but this is usually done while perched and rarely on the wing as is the habit of humming-birds. Injurious insects occur among the following orders: Coleoptera, Hymenoptera, Lepidoptera, Diptera, Hemiptera (both heteroptera and homoptera), Orthoptera, Neuroptera and Thysanoptera. All Rights Reserved. Printable Insects sentences worksheet and vocabulary activity. These minute insects are found amongst old books and furniture. The method of this dorsal closure varies in different insects. White and yellow colours predominate and insects with a proboscis of medium length are the common pollinating agents, such as short-tongued bees. The insects visit the plant in large numbers, attracted by the foetid smell, and act as carriers of the pollen from one spathe to another. Many insects have wings. Insects are the largest group in the animal kingdom. The development of such diversely-formed insects as the offspring of the unmodified females which show none of their peculiarities raises many points of difficulty for students in heredity. Carpenter, Insects: their Structure and Life (London, 18 99); L. C. Miall, Natural History of Aquatic Insects (London, 1895). On the other hand, there are thousands of very small species, and the tiny " fairy-flies " (Myynaridae), whose larvae live as parasites in the eggs of various insects, are excessivel y minute for creatures of such complex organization. During the pre-Linnaean period, the beauty of insects - especially the Lepidoptera - had attracted a number of collectors; and these "Aurelians" - regarded as harmless lunatics by most of their friends - were the forerunners of the systematic students of later times. The primary function of this poison is to kill the prey upon which they feed, its action being very rapid upon insects. - We have al 17 ready seen that in numerous lower insects the abdomen 18 is formed from twelve divi 19 sions placed in linear fashion. Class definition is - a body of students meeting regularly to study the same subject. insect example sentences. Thus prepared, the specimens are placed on shelves or movable trays, at intervals of about 6 in., in an air-tight cupboard, on the inner side of the door of which, as a special protection against insects, is suspended a muslin bag containing a piece of camphor. All the arthropods have distinguishing characteristics from other animals, but the members of these two classes have exhibited very distinctive physiognomies and those are good enough to identify insects from arachnids. Insects vs Arachnids Arthropods are composed of few classes, but insects and arachnids are two of the most important classes in the phylum. Other industries of a desultory character include the collection of archil, or Spanish moss, on the western side of the Californian peninsula, hunting herons for their plumes and alligators for their skins, honey extraction (commonly wild honey), and the gathering of cochineal and ni-in insects. b, c) with a deep groove on its anterior face; this organ is formed by the second pair of maxillae and corresponds therefore to the labium or " lower lip " of biting insects. CADDIS-FLY and Caddis-Worm, the name given to insects with a superficial resemblance to moths, sometimes referred to the Neuroptera, sometimes to a special order, the Trichoptera, in allusion to the hairy clothing of the body and wings. Insects are tiny animals with six legs. (Is a sentence) -Sydney C. ♥ (Is a sentence) -Sydney C. ♥ 0 0 1 ECONOMIC ENTOMOLOGY, the name given to the study of insects based on their relation to man, his domestic animals and his crops, and, in the case of those that are injurious, of the practical methods by which they can be prevented from doing harm, or be destroyed when present. Although in the case of the majority of Diptera the body is more or less clothed with hair, the hairy covering is usually so short that to the unaided eye the insects appear almost bare; some forms, however, such as the bee-flies (Bombylius) and certain robber-flies (Asilidae) are conspicuously hairy. Insect, any member of the class Insecta, the largest class of phylum Arthropoda. Although one of the characteristics of insects is the brevity of their adult lives, a considerable number of exceptions to the general rule have been discovered. In the Mesozoic rocks (Trias and Lias) there have been discovered remains of insects intermediate between those ancient forms and our modern cockroaches, the differentiation between forewings and hindwings having begun. Linnaeus in his Systema naturae (1735) grouped under the class Insecta all segmented animals with firm exoskeleton and jointed limbs - that is to say, the insects, centipedes, millipedes, crustaceans, spiders, scorpions and their allies. Much has been done in keeping out the insects by fine wire netting placed on the windows and the doors of houses, especially in the railwaymens cottages. In some of these insects the wings are so small as to be useless for flight, being modified altogether for stridulation. Zool. Lubbock (Lord Avebury), Origin and Metamorphosis of Insects (London, 1874); L. Snares of another type consisting of a tangled mass of threads amongst which the spiders pick their way with ease, but which are impassable to insects, are spun by members of the Theridiidae and Pholcidae; but by common consent the so-called orbicular web, so characteristic of the Argyopidae but by no means confined to them, is regarded as manifesting the greatest perfection of instinct in snare-spinning. If the observer takes up a suitable position near water, his coat is often seen to be covered with the cast sub-imaginal skins of these insects, which had chosen him as a convenient object upon which to undergo their final change. Most lizards live on animal food, varying from tiny insects and worms to lizards, snakes, birds and mammals, while others prefer a mixed or an entirely vegetable diet. An interesting feature of the development of Chaetognaths is that, as in some insects, the cells destined to form the reproductive organs are differentiated at a very early period, being apparent even in the gastrula stage. The Sapygidae are parasitic on bees, while the Scoliidae are large, robust and hairy insects, many of which prey upon the grubs of chafers. 1-22; B. aid is sought, and there are also numerous devices for protecting the pollen and nectar from rain and dew or from the visits of those insects which would not serve the purpose of pollen-transference (unbidden guests).'. Insect definition is - any of a class (Insecta) of arthropods (such as bugs or bees) with well-defined head, thorax, and abdomen, only three pairs of legs, and typically one or two pairs of wings. This consideration leads us to one of the most remarkable and fascinating features of 'ant-communities - the presence in the nests of insects and other small arthropods, which are tended and cared for by the ants as their " guests," rendering to the ants in return the sweet food which they desire. hollow trees or similar situations, where the insects may be seen,, according to T. - Many ants feed largely and some almost entirely on the saccharine secretions of other insects, the best known of which are the Aphides (plant-lice or " green-fly "). the application of ordinary antiseptic powders to leaves inside which a Fungus, such as a Uredo or Ustilago, is growing can only result in failtire, and similarly if tobacco fumes, for instance, are applied when the insects concerned are hibernating in the ground beneath. The females of some social insects have been known to live for many years. Their food consists of minute insects or mites. And no student can doubt that the stone-flies are akin to Orthoptera and the caddis-flies to the Lepidoptera, while dragon-flies and May-flies stand in an isolated position with regard to all other insects. The passage at first runs obliquely upwards in the bank, sometimes to a distance of as much as 50 ft., and expands at its termination into a cavity, the floor of which is lined with dried grass and leaves, and in which, it is said, the eggs are laid' and the young brought up. Ormerod, Manual of Injurious Insects (I89o); C. V. In other cases the presence of insects, Fungi or poisons at the roots may be looked for. The Coleoptera can be traced back farther in time than any other order of insects with complete transformations, if the structures that have been described from the Carboniferous rocks of Germany are really elytra. Did You Know? The sense of being followed didn't leave even in the full light of day. For instance, the commonest and best-known cases are found in insects where both mimic and model may belong to the same genus, sub-family, family or order, or to different orders. 4 juin 2016 - Explorez le tableau « Animaux/ Insectes » de Alexandra, auquel 442 utilisateurs de Pinterest sont abonnés. Insects are numerous, and of about 500 species of beetle some 80% are not known to exist elsewhere; cockroaches and green locusts are pests, as are, also, mosquitoes,' wasps, scorpions, centipedes and white ants, which have all been introduced from elsewhere. Galls are formed also by hemipterous and homopterous insects of the families Tingidae, Psyllidae, Coccidae and Aphidae. The flowers show well-marked adaptation to their color and attract insects. Ephemeridae belong to a very ancient type of insects, and fossil imprints of allied forms occur even in the Devonian and Carboniferous formations. The phylogeny of insects has since been discussed by F. The Manchurian crane is common, as also are eagles, cuckoos, laughing doves, &c. Insects abound, owing to the swampy nature of much of the country. If we admit that the larva has, in the phylogeny of insects, gradually diverged from the imago, and if we recollect that in the ontogeny the larva has always to become the imago (and of course still does so) notwithstanding the increased difficulty of the transformation, we cannot but recognize that a period of helplessness in which the transformation may take place is to be expected. Elaboration in the form of the feelers, often a secondary sexual character in male insects, may result from a distal broadening of the segments, so that the appendage becomes serrate, or from the development of processes bearing sensory organs, so that the structure is pinnate or feather-like. As shown by the number and variety of species, the Orthoptera are the most dominant order of this group. His chapter on the flea, in which he not only describes its structure, but traces out the whole history of its metamorphoses from its first emergence from the egg, is full of interest - not so much for the exactness of his observations, as for its incidental revelation of the extraordinary ignorance then prevalent in regard to the origin and propagation of "this minute and despised creature," which some asserted to be produced from sand, others from dust, others from the dung of pigeons, and others from urine, but which he showed to be "endowed with as great perfection in its kind as any large animal," and proved to breed in the regular way of winged insects. Lepidoptera contains butterflies, moths, and other such insects. Amongst Orthoptera we find many noxious insects, notably the locusts, which travel in vast cloud-like armies, clearing the whole country before them of all vegetable life. Examples known to science are not all species that exist in nature. Festschrift zum 70ten Geburtstage von Ernst Haeckel, 19(34) has restored the conditions existing in the lagoons and atoll reefs of the Jurassic sea of Solnhofen in Bavaria; he has traced the process of gradual accumulation of the coral mud now constituting the fine lithographic stones in the inter-reef region, and has recognized the periodic laying bare of the mud surfaces thus formed; he has determined the winds which carried the dust particles from the not far distant land and brought the insects from the adjacent Jurassic forests. They make burrows wherein they place insects or spiders which they have caught and stung, laying their eggs beside the victim so that the young larvae find themselves in presence of an abundant and appropriate food-supply. Although created as a complement of our online activities and games, these resources can be used separately in any way you want. A more general and practical interest attaches to the insects which act as their intermediate hosts. Copyright © 2020 LoveToKnow. In most insects the leg is built up of nine segments: (1) a broad triangular, sub-globular, conical or cylindrical haunch (coxa); (2) a small trochanter; (3) an elongate stout thigh (femur); (4) a more slender shin (tibia); and (5-9) a foot consisting of five tarsal segments. Metamorphosis in Diptera is complete; the larvae are utterly different from the perfect insects in appearance, and, although varying greatly in outward form, are usually footless grubs; those of the Muscidae are generally known as maggots. See Neuroptera, among which these insects were formerly comprised. (London, 1900), and " On a collection of Insects and Arachnids " in Proc. They are relatively shorter and broader insects than the Embiidae with large prothorax and long wings, which have a transverse line of weakness at the base and are usually shed after the nuptial flight. His order of wingless insects (Aptera) included Crustacea, spiders, centipedes and other creatures that now form classes of the Arthropoda distinct from the Hexapoda; it also included Hexapoda of parasitic and evidently degraded structure, that are now regarded as allied more or less closely to various winged insects. 3. sur les animaux sans vertebres, 1816) established the homology of the jaws of all insects whether biting or sucking, deserves especial honour. Punctuation grade-1. Incorporate students' natural curiosity about animals in your class with lessons and printables on sea life, endangered species, wildlife, and more. I was never still a moment; my life was as full of motion as those little insects that crowd a whole existence into one brief day. The insects belong to the family Elateridae, whose characters are described under Coleoptera. The winged insects resemble the May-flies in their short feelers and in the large number (50 to 60) of their Malpighian tubes, but differ most strikingly from those insects in their strong wellarmoured bodies, their powerful jaws adapted for a predaceous manner of life, and the close similarity of the hind-wings to the forewings. He stamped on the insect. Discover (and save!) In the majority of ant-imitating spiders the forepart of the cephalothorax is constricted on each side to resemble the neck of the insect, and in many cases the similarity is increased by the presence of a stripe of white hairs which has the optical effect of cutting out an extra piece of integument, exactly as occurs in analogous cases in insects. Insects are comparatively few, but ants swarm destructively in the heat of the year. A week's worth of activities and more! In many of these insects, while most individuals of the species are wingless, winged specimens are now and then met with. Insect life is perhaps poorer and less varied than in Brazil, but in the 14 orders of insects there are no less than 98 families, each including many genera and species. It has been discovered that at the beginning of the Eocene the lake of Rilly occupied a vast area east of the present site of Paris; a water-course fell there in cascades, and Munier-Chalinas has reconstructed all the details of that singular locality; plants which loved moist places, such as Marchantia, Asplenium, the covered banks overshadowed by lindens, laurels, magnolias and palms; there also were found the vine and the ivy; mosses (Fontinalis) and Chara sheltered the crayfish (Astacus); insects and even flowers have left their delicate impressions in the travertine which formed the borders of this lake. The forests literally swarm with insects of all kinds, from cicadae to beautiful butterflies, and from stickand leaf-insects to endless. All the insects included in this group are small and form two families - the Cynipidae and the Figitidae. Imperative sentence grade-1. While 1 is ambiguous, 2 is not. The blackbird feeds chiefly on fruits, worms, the larvae of insects and snails, extracting the last from their shells by dexterously chipping them on stones; and though it is generally regarded as an enemy of the garden, it is probable that the amount of damage by it to the fruit is largely compensated for by its undoubted services as a vermin-killer. In the structure of the digestive system, beetles resemble most other mandibulate insects, the food-canal consisting of gullet, crop, gizzard, mid-gut or stomach, intestine and rectum. He scratched the insect bite on his leg. With more than 18,000 kinds of butterflies and around 400,000 kinds of beetles, insects have … In aquatic insects various devices for obtaining or entangling air are found; these modifications are described in the special articles on the various orders of insects (Coleoptera, Hemiptera, &c.). They are small insects, having straight antennae, and a compressed, usually very short abdomen with the second or second and third segments greatly developed, and the rest imbricated, and concealing the partially coiled ovipositor. Other flies of the genus Volucella, larger and heavier in build than Eristalis, resemble humble-bees in colour and form, and it was formerly supposed that the purpose of this similarity was to enable the flies to enter with impunity the nests of the humble-bees and to lay their eggs amongst those of the latter insects. The most typical family is the Drepanidae, so named for the stout sickle-shaped beak with which the birds extract insects from heavy-barked trees; Gadow considers the family American in its origin, and thinks that the Moho,' a family of honey-suckers, were later corners and from Australia. Scudder have revealed insects with the general aspect of cockroaches and phasmids, but with the two pairs of wings similar to each other in texture and form. This is well exemplified by the leaf-insects (Phyllium) and stickinsects (Bactra), where the likeness to the models after which they are named is procryptic; and also by various species of tropical Mantidae which resemble flowers for the purpose of alluring insects within striking distance and perhaps also for concealing their identity from enemies. We use the model of a 1.4 paragraph, which includes a main idea, detail, example/explanation, and a wrap-up sentence. Insects, are a class in the phylum Arthropoda. Some of the American varieties have been introduced into France and other countries infested with Phylloxera, to serve as stocks on which to graft the better kinds of European vines, because their roots, though perhaps equally subject to the attacks of the insects, do not suffer so much injury from them as the European species. They may be over 90% of animal species on Earth. (Kingdom Animalia, Phylum Arthropoda, Subphylum Hexapoda.) 0. The future continuous tense is used to indicate an action over a period of time. Thus, wasps catch flies; worker ants make raids and carry off weak insects of many kinds; bees gather nectar from flowers and transform it into honey within their stomachs - largely for the sake of feeding the larvae in the nest. The enormous rate at which aphids multiply under favourable conditions makes them of the greatest economic importance, since the growth of immense numbers of the same kind of plant in close proximity - as in ordinary farm-crops - is especially advantageous to the insects that feed on them. But if classification is to express relationship, it is impossible to associate in the same order families whose kinship to insects of other orders is nearer than their kinship to each other. Neotropical and distinctively Sonoran insects mingle with members of the Holoarctic fauna across a wide " transition zone " in North America. " The open rose is not perfectly pure; bees have bathed in its chalice, You and I were drawn together many years ago by a common love for, Here are certain criteria for placing these, But when once inside the circle of the class of, The microscopical, tadpole-shaped young penetrate into the bodies of, Only years of dust could be seen inside with the shells of hundreds of dead, Just behind the mandibles are the maxillae, which are trilobate at the end, as in the three orders of, But mamma does not allow Jean to kill any, Mamma has told us all, perticularly Jean, to bring her all the little dead, I have trees of the Li and Lang varieties which bear annually and have never been bothered by, How much the palpi vary in these groups of, Insects in a sentence | Short example sentence for insects[Class 1-5], Repletion in a sentence | Short example sentence for repletion[Class 1-5], Notably in a sentence | Short example sentence for notably[Class 1-5], Healing in a sentence | Short example sentence for healing[Class 1-5], Preciseness in a sentence | Short example sentence for preciseness[Class 1-5], Conveyor in a sentence | Short example sentence for conveyor[Class 1-5], Bore in a sentence | Short example sentence for bore[Class 1-5], Gnash in a sentence | Short example sentence for gnash[Class 1-5], Injury in a sentence | Short example sentence for injury[Class 1-5], Has Been in a sentence | Short example sentence for has been[Class 1-5], Crabs in a sentence | Short example sentence for crabs[Class 1-5], Sharks in a sentence | Short example sentence for sharks[Class 1-5], Animals in a sentence | Short example sentence for animals[Class 1-5], Snakes in a sentence | Short example sentence for snakes[Class 1-5], Turtles in a sentence | Short example sentence for turtles[Class 1-5], Scorpion in a sentence | Short example sentence for scorpion[Class 1-5], Insect in a sentence | Short example sentence for insect[Class 1-5], Birds in a sentence | Short example sentence for birds[Class 1-5], Creatures in a sentence | Short example sentence for creatures[Class 1-5], Words to describe Insects | Insects Adjectives. Not a few of these insects, however, are entirely wingless. The views of Adler as to the alternation of generations of numerous gall-flies have been fully confirmed, it having been ascertained by direct observation that the galls and the insects produced from them in one generation are entirely different from the next generation; and it has also been rendered certain that frequently one of the alternate generations is parthenogenetic, no males being produced. How to use insect in a sentence. Insects ARE a class, Insecta. The question whether these projections can be considered an indication of former polypody in insects has been raised. ♦ Will be doing . 2. The insects are the largest class in the animal world, outnumbering all other animals. The Coleoptera have been probably more assiduously studied by systematic naturalists than any other order of insects. Example sentences with the word insect. Various species among those that are predaceous attack smaller insects, hunt in packs crustaceans larger than themselves, insert their narrow heads into snail-shells to pick out and devour the occupants, or pursue slugs and earthworms underground. and the Gryllidae or crickets (q.v.). In generalized biting insects, such as cockroaches and locusts (Orthoptera), the parts of a typical maxilla can be easily recognized in the labium. In two of the families - the Mutillidae and Thynnidae - the females are wingless and the larvae live as parasites in the larvae of other insects; the female Mutilla enters humble-bees' nests and lays her eggs in the bee-grubs. Irregular plurals grade-2. The maxillae of the hinder pair become more or less fused together to form a " lower lip " or labium, and the segment of these appendages is, in some insects, only imperfectly united with the head-capsule. It would seem then that by the stinging of insects or spiders their powers of resistance are overcome and their escape prevented; that some are killed outright and some paralysed is merely an incidental result. Most insects possess a pair of compound eyes, and many have, in addition, three simple eyes or ocelli on the vertex. In insects so widely separated as bristle-tails and moths this occurs occasionally. Burmeister (1832) and has reference to the biting habits of the insects. How to use class in a sentence. Insecta or Hexopoda (insects) is the most diverse class. The overall study of insects … Insects of the State of New York, p. 167 (Albany, 1856). (A and B from Lankester's Treatise on Zoology, part iv., C original.) - The Hop Aphis (Phorodon After the Coccidae the next most important insects male; C, ovigerous wingless female; economically are r the plant lice or A phididae. It is now, in fact, generally admitted that metamorphosis has been acquired comparatively recently, and Scudder in his review of the earliest fossil insects states that " their metamorphoses were simple and incomplete, the young leaving the egg with the form of the parent, but without wings, the assumption of which required no quiescent stage before maturity.". These insects are adorned with bands of black and yellow, or with bright metallic colours, and on account of their large size and formidable ovipositors they often cause needless alarm to persons unfamiliar with their habits. After examining a rock for ants or other insects, she leaned against it, drawing in the clean smell of the forest. The destruction of considerable portions of the forests by cattle, goats, insects, fire and cutting has been followed by reforesting, the planting of hitherto barren tracts, the passage of severe forest fire laws, and the establishment of forest reserves, of which the area in 1909 was 545,746 acres, of which 357,180 were government land. Many insects, however, can readily extend their range, and a careful study of their distribution leads us to discriminate between faunas rather than definitely to map regions. It is believed that insects of this group are represented among Silurian fossils. How To Use Bugs In A Sentence? Morgan sums up a discussion on Lubbock's experiments in which the ants failed to utilize particles of earth for bridge-making, with the suggestive remark that " What these valuable experiments seem to show is that the ant, probably the most intelligent of all insects, has no claim to be regarded as a rational being.". 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