Especially, that form of sexual reproduction in which an embryo undergoes a series of marked changes of external form, as the chrysalis stage, pupa stage, etc.
A stage intermediate between the larva and pupa of bees and certain other hymenopterous insects.
Bearing or containing a pupa; -- said of dipterous larv\'91 which do not molt when the pupa is formed within them.
The larv\'91 of many insects are much like the adults in form and habits, but have no trace of wings, the rudimentary wings appearing only in the pupa stage.
Covered with a hard chitinous case, as the pupa of certain files.
The pupa of insects which undergo only a slight change in passing to the imago state.
A stage in the development of certain insects, such as the May flies, intermediate between the pupa and imago.
A very natural difficulty will arise in the mind as to what possible means of escape can be granted to such insects as live in the pupa state in the interior of old trunks of trees, or even in little caves of the earth.
We may learn, in reflecting upon the facts brought to light by this ingenious entomologist, with what admirable care and skill the Great Creator has arranged the period to be occupied by the insect in the pupa state.
K] This pupa has its upper portion encased in the peculiar manner represented, the chest and lower portion being distinct.
The little hooks of the tail of the pupa are represented in the adjoining cut much enlarged.
The cut on the next page represents the perfect insect and the pupa thus carefully provided for.
It would probably be advantageous to the species that the larva should not have rudimentary functionless wings; and the establishment of the wings as external organs would therefore become deferred to the pupa stage.
The transition from the larval to the adult state is therefore necessarily a more or less sudden one, and takes place during the quiescent pupa condition.
During the succeeding pupa stage the metamorphosis into the adult form takes place, but this has not been followed out in detail.
If the larva and imago diverged still more from each other, a continually increasing amount of change would have to be effected at the pupa stage.
The pupa stage, once started, might easily become a more important factor in the metamorphosis.
The pupa lies with the ventral side parallel to and adjoining the surface of attachment, while the long axis of the body of the young Cirriped is placed nearly at right angles to the surface of attachment.
In the Tipulidae the larval skin is thrown off at the pupa stage, and in some cases the pupae continue to move about.
The chitinous skin of the Cirriped passes round the head of this bay, but on the moult of the pupa skin taking place becomes stretched out, owing to the posterior part of the larva bending dorsalwards.
In the Alcippidae the larva leaves the egg as a Nauplius, and this stage is eventually followed by a pupa stage closely resembling that of the Thoracica.
These facts are easily explained on the supposition that the pupa stage has become secondarily adapted to play a part in the economy of the species quite different from that to which it owes its origin.
The pupa stage of Corethra is relatively very short, and the changes in the internal parts which take place during it are not considerable.
Many of the external adult organs are however formed prior to the pupa stage, but do not become visible on the surface.
In a few minutes each of the invaders emerges, carrying in its mouth the pupa of a worker negro, which it has obtained in spite of the vigilance and valour of its natural guardians.
It is the full-grown larva, however, which corresponds most nearly to the adult Myriopod, while the pupa and imago are stages peculiar to the Insect.
Enough interest was excited by the Traité Anatomique to call for the fulfilment of a promise made in the preface that the description of the pupa and imago should follow.
The vesiculæ seminales are simple, rounded lobes in the pupa (fig.
After remaining in the pupa stage about a week, they change into beetles again, which either begin feeding or go to winter quarters.
After the pupa stage comes the adult insect, which may be a moth or a beetle.
In this stage the insect curls itself up under the protection of a silken cocoon like the tussock moth, or of a curled leaf like the brown-tail moth, or it may be entirely unsheltered like the pupa of the elm leaf beetle.
In all three families also the pupa runs about, eats, and has rudiments of wings.
The pupais the embryonic Crab or its antetype, it is the Snail in its shell.
The pupa state is perfect; the perfect insect generally creeps out of the chrysalis by a slit taking place down the back.
From the egg a grub hatches out, which, after a time, passes into a motionless pupa stage, and ultimately the investment of this splits open so that the perfect insect may emerge.
Later on a pupa stage is reached, from which the winged adult ultimately emerges.
If my history is the history of my clothes, let me so study it out, formulate, as it were, the meditations of the pupa upon its successive integumenta.
A gray pupa I was holding in my hand suddenly burst its envelope, and in halt a minute on its legs stood a fly, thus identifying the perfect insect.
Occasionally a pupa could not cast off its envelope, and came wriggling out of the ground, when it was immediately captured by ants.
Leaving its host in September, it spins a delicate double cocoon in which it remains all winter in the larva state, transforming to pupa in May, and issuing as an imago in June.
Aristotle and Harvey (De generatione animalium, 1651) had considered the insect larva as a prematurely hatched embryo and the pupa as a second egg.
Go where we will, then, we may here and there behold isolated individuals busily probing the fissured bark of trees for the eggs and pupa of insects.
While thus engaged in search of the pupa of insects, they are very reckless, and keep up a continual twittering.
Coarctate, or Obtected, pupa, a pupa which is incased in the dried-up skin of the larva, as in many Diptera.
Defn: Covered with a hard chitinous case, as the pupa of certain files.
Defn: One of several marked phases or periods in the development and growth of many animals and plants; as, the larval stage; pupa stage; zoea stage.
The fine, soft thread produced by various species of caterpillars in forming the cocoons within which the worm is inclosed during the pupa state, especially that produced by the larvæ of Bombyx mori.
Defn: Bearing or containing a pupa; -- said of dipterous larvæ which do not molt when the pupa is formed within them.
Defn: The pupa of insects which undergo only a slight change in passing to the imago state.
Defn: A stage intermediate between the larva and pupa of bees and certain other hymenopterous insects.
The larvæ of many insects are much like the adults in form and habits, but have no trace of wings, the rudimentary wings appearing only in the pupa stage.
PUPA With the fourth molt the active feeding larva changes to the still active but non-feeding pupa (Fig.
Pupa of house-fly with the end broken to allow the fly to issue.
Instead of the breathing-tube on the eighth segment of the abdomen as in the larva, the pupa has two trumpet-shaped tubes on the back of the thorax through which it now gets its air from above the surface.
The Carolina moths come from their pupa cases as featherweights step into the sparring.
The pupa is covered with a bluish efflorescence, enclosed in a slight cocoon of silk, spun amongst leaves or bark.
It is imperative to bake any earth or sand used for them to kill pests invisible to the eye, that might bore into the pupa cases and destroy the moths.
The one that entered the ground had pushed the earth from it on all, sides at a depth of three inches, and hollowed an oval space the size of a medium hen egg, in which the pupa lay, but there was no trace of its cast skin.
They began the task of eating until they reached the pupa state, by turning on their shells and devouring all of them to the glue by which they were fastened.
The inner case was smooth and dark inside and the broken pupa case nearly black.
In this little chamber close the length and circumference of an average sized woman's two top joints of the first finger, the caterpillar transforms to the pupa stage, crowding its cast skin in a wad at the bottom.
I made two pictures of it, although transformation to the pupa stage was so far advanced that it was only half length, and had a shrivelled appearance like the one I once threw away.
It was a beautiful red-brown in colour, long and slenderer than a number of others in my box of sand, and had a long tongue case turned under and fastened to the pupa between the wing shields.
The pupa is thickly coated with a sticky substance that seems to serve the double purpose of facilitating its exit from the caterpillar skin and to dry over it in a glossy waterproof coating.
Pupa cases from earth consist of two principal parts: the blunt head and thorax covering, and the ringed abdominal sections.
I have said that most insects eat no food in the pupa state.
The second, the pupa or chrysalis, then offers itself to observation.
Because, as their formation becomes perfected, and the fluids of the body of the pupa become absorbed in the production of the light texture of the wings, &c.
This term has generally, but very improperly, been also applied to the pupa state, so that pupa, chrysalis, and nymph have all been employed to represent one state.
At this time, and not before, the parts of the pupa are forming within the skin of the caterpillar, which may be easily seen by dissection.
The grating is placed a little inside the margin of the opening, and fits exactly within it, and its object is to protect the pupa from invasion, and at the same time, to admit water for respiration.
When the crumpled form of the gaudy fly begins to expand within, and to knock at the door of its sepulchre, the pupa quits the watery element for ever, and betakes itself to the dry land, or to the slip of cork placed in the jar for its use.
The larva makes and carries about a bag or basket-like case of silk and twigs, which it afterwards hangs up to shelter the pupa and wingless adult females.
The pupa is incompletely obtect, with three (in some females only two) to five free abdominal segments, and emerges partly from the cocoon before the moth appears.
The female pupahas three, the male four, free segments.
The larva has usually ten prolegs, whose hooklets are arranged only along the inner edge, while the immobile pupa is always obtect with only two free abdominal segments (the fifth and sixth).
The pupa has four or five movable segments, and the larval prolegs have complete circles of hooklets.
In the higher Lepidoptera the pupa is immovable, and the imago, after the ecdysis of the pupal cuticle, must emerge.
The importance of the pupain the phylogeny and classification of the Lepidoptera has lately been demonstrated by T.
The pupa which has three or four free segments in the male and four or five in the female, rests in a cocoon within the food plant, often strengthened by chips of wood, or in a subterranean cocoon.
The imago leaves the pupa after from five or six weeks, an uncommonly long period for a butterfly.
In more southern regions the butterfly pupa rests not more than fourteen days in summer.
Besides through this peculiar position of the body, the pupa of Eueides Isabella is distinguished by short hooked and long narrow sabre-like pairs of processes on the back and head.
The minute colour variations of the pupa therefore have no connection with the colour of the caterpillar, both green and brown larvæ furnishing sometimes reddish-yellow and sometimes greenish-yellow pupæ.
On 19th day, 1 Telamonides emerged from a pupa put on the ice twelve hours after pupation, and kept there eleven days.
The colour of the pupa of Acræa Thalia is whitish, the wing-veins with some other markings and the spines are black; metallic spots are absent.
The processes of the pupa of Eueides suggest such fungoid growths, although I certainly cannot assert that to our eyes in broad daylight the resemblance is very striking.
On 19th day, 1 Walshii emerged from a pupa two hours old, and on ice eleven days.
In their wild journeyings on and on before spinning the pupa shroud, they fall victims in attempting to cross streams.
Insects are enfeebled at all changes in their life, and at each successive moult, when the pupa case is broken, too weak to keep guard, they flutter and rest on the water an instant before flitting away.
Having lived three or four weeks in the water, during which time it has entered the pupa state, the original skin is cast oft; and the insect is transformed into a different and more perfect state.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "pupa" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: caterpillar; grub; larva; maggot; nymph
