| 单词 | instar |
| 例句 | In each new phase, called an instar, a caterpillar might change color or texture—very confusing to naturalists like Maria. The Girl Who Drew Butterflies: How Maria Merian's Art Changed Science 2018-02-20T00:00:00Z Eggs hatching into caterpillars, which grow and shed skin between instars. The Girl Who Drew Butterflies: How Maria Merian's Art Changed Science 2018-02-20T00:00:00Z The maggot stage, in particular, can be further subdivided into three distinct phases, known as instars. Lords of the flies: the insect detectives 2010-09-23T07:00:00Z All the other planthoppers wait until their fifth instar before transforming. Inside the race to stop lanternflies—before they get to a town near you 2023-08-31T04:00:00Z On their way to adulthood, spongy moths go through multiple larval stages, or instars, over six to eight weeks in spring — five instars for males, six for females. What to do if you see a spongy moth (or its very hungry caterpillars) 2022-10-13T04:00:00Z In later instars some of these caterpillars step up their powers of illusion, taking on the look of a snake's face. These Adaptations Give Insects a Survival Advantage 2017-08-26T04:00:00Z The young caterpillars go through five series of molts and instars over a period of 10 to 14 days before forming their chrysalis and transforming within it for seven to 10 days. East Texas man shares joy of raising, observing butterflies 2017-06-04T04:00:00Z We ascertained under a dissecting microscope that many of them, including nymphs of all four instars, stung the larvae with their stylets. Dancing woolly aphids will probably stab you 2012-09-05T15:15:15.080Z In fact, one night, the team discovered a few third instars, which have no wings and are less than an inch long, had crawled almost 215 feet away from where they’d been released. Inside the race to stop lanternflies—before they get to a town near you 2023-08-31T04:00:00Z The early instars, less than a quarter of an inch long, climb the tree from which they emerged or one that is close by. What to do if you see a spongy moth (or its very hungry caterpillars) 2022-10-13T04:00:00Z Ann could remember, no more than a first instar herself, her parents hopefully watching their offspring try desperately to hatch. The Making of a Mutant: A Fruit Fly Love Story 2012-04-15T01:15:00.220Z Young resembling parents, but penultimate instar passive and enclosed in a filmy pellicle. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z Sixty-nine per cent of the warbles were in the third instar stage, and the rest were in the second instar stage. Comparative Ecology of Pinyon Mice and Deer Mice in Mesa Verde National Park, Colorado 2012-02-24T03:00:32.243Z It takes place in the same way as before and the caterpillar enters upon the third instar of its larval life. Butterflies Worth Knowing 2011-08-10T02:00:15.887Z Unlike the day-feeding, younger instars, those in the last two stages feed at night, crawling down into bark crevices or leaf litter to hide during daylight, presumably to avoid predation. What to do if you see a spongy moth (or its very hungry caterpillars) 2022-10-13T04:00:00Z When she reached third instar, which for some reason had taken an inordinately long time, she worried about what lay beyond, and finally went to her mother, seeking answers. The Making of a Mutant: A Fruit Fly Love Story 2012-04-15T01:15:00.220Z Young animals always unlike parents, the wing-rudiments developing beneath the larval cuticle and only appearing in a penultimate pupal instar, which takes no food and is usually passive. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z Seventy-three per cent of the warbles were in the third instar stage; the rest were in the second instar stage. Comparative Ecology of Pinyon Mice and Deer Mice in Mesa Verde National Park, Colorado 2012-02-24T03:00:32.243Z Greek taken singly is, to use an indispensable Latin word, instar, the knowledge of all other languages. The Posthumous Works of Thomas De Quincey, Vol. 1 Because it is estimated that 80% or more of the foliage consumed by spongy moths is eaten during the last two instars, reducing the number of mature caterpillars on a treasured tree can pay off. What to do if you see a spongy moth (or its very hungry caterpillars) 2022-10-13T04:00:00Z Stadium -ia: the interval between the molts of larvae:= instar q.v.: any one period in the development of an insect. Explanation of Terms Used in Entomology The new instar—or temporary form—is often very different from the old one, and this is the essential fact of metamorphosis. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z The large, third instar larvae weighed about one gram apiece; there is little doubt that such large larvae induce trauma in their hosts. Comparative Ecology of Pinyon Mice and Deer Mice in Mesa Verde National Park, Colorado 2012-02-24T03:00:32.243Z And therefore grieve not if thy beauties die Though time do spoil thee of the fairest veil That ever yet covered mortality, And must instar the needle and the rail. Elizabethan Sonnet-Cycles Delia - Diana The first instar differs, however, from the adult in one conspicuous and noteworthy feature, it possesses no trace of wings. The Life-Story of Insects Moult: a period in the transformation when the larva changes from one instar to another: the cast skin of a larva that has moulted. Explanation of Terms Used in Entomology Some pupae are thus more active than some nymphs; the essential character of a pupa is not therefore its passivity, but that it is the instar in which the wings first become evident externally. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z Fortune was blind and cared not where she stroke, nor whom, without laws, Audabatarum instar, &c. The Anatomy of Melancholy The doctrine of the sanctity of kings, that, in the words of Tacitus, Princes are as Gods—Principes instar deorum esse—seemed to have taken a novel, because a literal, sense. Marius the Epicurean — Volume 1 Wing-rudiments appear, however, in an early instar as visible outgrowths on the thoracic segments, and become larger after each moult. The Life-Story of Insects Instar: the period or stage between molts in the larva, numbered to designate the various periods; e.g. the first instar is the stage between the egg and first molt, etc.: see stadium. Explanation of Terms Used in Entomology Pupa.—In the metabolic Hexapoda the resting pupal instar shows externally the wings and other characteristic imaginal organs which have been gradually elaborated beneath the larval cuticle. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z In many maggots the mouth-hooks and the front spiracles become more and more complex in form in the successive instars. The Life-Story of Insects In the pupa the wings and other characteristically adult structures are, for the first time, visible outwardly; it is the instar which marks the great crisis in transformation. The Life-Story of Insects The preparatory instars of such insects are aquatic; the adult instar is aerial. The Life-Story of Insects Having been formed beneath the cuticle of the wing-rudiments of the penultimate instar, the wings are necessarily abbreviated and crumpled. The Life-Story of Insects The penultimate instar of this sex in which the wing-rudiments are visible externally lies passively beneath the scale, its behaviour resembling that of a butterfly pupa. The Life-Story of Insects The penultimate instar is quiescent and does not feed. The Life-Story of Insects But this is not the final instar; may-flies are exceptional among insects in undergoing yet another moult after they have acquired wings which they can use for flight. The Life-Story of Insects But it is clear that only in the pupa, forming beneath the cuticle of the last larval instar, can they grow outwards. The Life-Story of Insects In all Ametabola and Hemimetabola these are visible externally long before the penultimate instar has been reached; in the Holometabola they are not seen until the pupal stage. The Life-Story of Insects The last larval instar again has short legs like the grub of the second period. The Life-Story of Insects The pupal cuticle has to be shed for the emergence of the imago, but the pupa is already a somewhat reduced model of the final instar, with abbreviated wings and doubled-up legs. The Life-Story of Insects Examples have been given of the exceptional passive condition of the penultimate instar in Exopterygota. The Life-Story of Insects Hence the preliminary armoured and active instar is necessary in order to reach the feeding place; this journey accomplished, the eruciform condition is at once assumed. The Life-Story of Insects The instars preceding this presumably had originally outward wing-rudiments in all insect life-histories, and the endopterygote condition was attained by the postponement of the outward appearance of these to successively later stages. The Life-Story of Insects The first instar in all insects has no visible wing-rudiments, but when they grow outwardly from the body, they necessarily become covered with cuticle, so that they must be visible after the first moult. The Life-Story of Insects As this difference persisted until a constantly later stage, and the pre-imaginal instar became necessarily a stage for reconstruction, the present condition of complete metamorphosis in the more highly organised orders was finally attained. The Life-Story of Insects |
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