Thus it seems that either the egg or the spermatozoon of the sea-urchin contains all the essential elements for the production of the perfect larva of a daughter organism.
For example, the unpalatable larva of the Cinnabar Moth (Euchelia jacobaeae) is said to mimic a wasp, because it has black and yellow rings round its body.
After a certain time the larvachanges into a pupa, and then emerges as a small brown beetle.
This larva is similar in size to that of Anobium, but can be distinguished at once by having legs.
The first idea about this insect was that it turned into a kind of beetle; afterwards it proved to be the larva or grub of a fly.
Now, this larva has the form of a tiny little creature covered with 'swimming' hairs.
The larva has twelve legs or arms, large compound eyes, and suckers enabling it to cling firmly.
Peiguot mentions an instance where, in a public library that was but little frequented, twenty-seven folio volumes were perforated in a straight line by one and the same larva of a small insect (Anobium pertinax or A.
Bennet tells us thelarva of a Lepidopterous insect (the Bugong?
A ruse for capturing the larva of the Cicindela, now commonly practiced by entomologists, is founded on the same principle.
This larva was noticed but a few years before the war began, and then appearing, as it were, in armies, it was called the Army-worm.
A similar larva is dressed at Mauritius under the name of Moutac, which the whites as well as the negroes eat greedily.
They have a similar dainty in Java in the larva of some large beetle, which the natives call Moutouke.
According to Linnaeus, the larva of the Prionus cervicornis is held in equal estimation; and that of the Acanthocinus tribulus when roasted forms an article of food in Africa.
On the sixth day the glass pond had only two tenants worth speaking of--the dragon-fly larva and myself.
If the dragon-fly larva ate him, I should never forgive myself, and you know you don't know for certain that the beetle is Hydröus piceus.
And if I hadn't eaten him, the dragon-fly larva would.
When the sun went down the dragon-fly larva was sitting on the stalk, saying nothing, with its legs drawn up under it.
Yes, that is the worst part of it," the larva answered sadly.
All day long the larva of the dragon-fly was crawling up and down the water-lily's stalk.
Down on the leaf of the water-lily lay its ugly gray larva case.
Joly demonstrated that the famous "feather-tailed binocle" was the larva of an insect.
Geoffroy, because of the two large eyes, and without paying attention to the ocelli, named this larva the "feather-tailed binocle.
Orthoptera genuina, the larva has precisely the same habits as the adult.
Smerinthus Ocellatus; adult larva with distinct subdorsal on the six foremost segments.
This insect inhabits the plains of Germany, and in the Alps extends to an elevation of 7000 feet, where it possesses a larva differently marked and coloured (E.
The larva of Dione Juno is thus as closely related to that of Acræa Thalia as it is to that of its congener Dione Vanillæ.
This structure disappears in the larva only to reappear in a reduced form in later stages.
The larva is remarkable on account of its long feelers, the presence of pairs of jointed prolegs on the first eight abdominal segments, an anal sucker beneath the last segment and bladder-like outgrowths on the cuticle.
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).
In the larva the prolegs on the hindmost segment are sometimes modified into pointed outgrowths which are carried erect when the caterpillar moves about.
All Lepidoptera are hatched as the eruciform soft-bodied type of larva (fig.
In the Pieridae there are two anal nervures in the hindwing, while the second anal nervure in the forewing runs into the first; the larva is cylindrical and hairy without an osmaterium.
Poulton has shown that the colours of some exposed pupae vary with the nature of the surroundings of the larva during the final stage.
The larvahas complete circles of hooklets on its five pairs of prolegs, and the pupa (usually completely obtect) does not move at all from its cocoon.
As might be expected, the conditions to which larva and pupa are subjected have often a marked influence on the nature of the imago.
The larva in this family also is an exposed feeder, but it is remarkable in form, being flattened and slug-like, without prolegs and adorned with curious spinous processes.
The egg is elongate and sub-conical in form and ornamented with numerous ribs, while the larva is usually protected by numerous spines (fig.
Xylina ornithopus and a few other species are said to be always carnivorous when opportunity offers; the small looping caterpillar of a "pug" moth (Eupithecia coronata) has been observed to eat a larvathree times as big as itself.
The two hinder pairs of prolegs are therefore alone functional and the larva progresses by "looping," i.
The larva is cylindrical, never hairy but often tuberculate and provided with a dorsal retractile tentacle (osmaterium) on the prothorax.
A similar larva characterizes the South American Brassolinae or owl-butterflies--robust insects (figs.
The fully-fed larva winters in an underground cocoon and then changes into the most remarkable of all known lepidopterous pupae, with relatively enormous toothed mandibles which bite a way out of the cocoon in preparation for the final change.
These eggs hatch out into transparent band-like larva, with very small heads formerly known as Leptocephalus, an ancient name which is now taken for the genus of congers, having been first used for the larva of the common conger-eel.
The translucent band-shaped larva of the common eel has been very recently identified and described by Dr.
In five or six days the larva grows so fat upon this that it nearly fills the cell, and then the bees seal up the mouth of the cell with a thin cover of wax, made of little rings and with a tiny hole in the centre.
The nursing bees take great care of these eggs, and instead of putting ordinary food into the cell, they fill it with a sweet, pungent jelly, for this larva is to become a princess and a future queen bee.
The larva of the dragon-fly is one of the ugliest of creatures.
At least one of these worms has an intermediate stage in the ordinary housefly, the fly becoming infested while it is a larva developing in horse manure.
We took charge of a partly grown larva on the afternoon of August tenth, and between that date and August fifteenth, when it spun its cocoon, it ate forty–two house flies besides a big Tabanus.
When the larva is hatched the mother brings more and more flies, the flies being larger and larger as it grows.
The provision for one larvais probably twelve or fourteen bees, the capture of which, in good weather, would be a fair day’s work.
The piece actually attacked by the larva is soon a disorganized mass, likely to decay speedily; but it is small and is consumed before decomposition can advance, for when a larva once attacks a spider it does not leave it for another.
The larva of bombycina cocoons nine days after the egg is laid.
In other genera the egg changes into a larva imperceptibly, there being no sloughing off of the skin.
The completed cell contained a larva and parts of eighteen flies of different sizes, four species being represented.
This adjustment of the size of the fly to the growth of the larva has also been noted by Fabre.
In a second nest to which food was being carried, we found four caterpillars and a larva about three days old, all the conditions being like those in the other example.
The cricket that we had seen taken in was dead, as was also the one upon which the larva was feeding.
We did not succeed in finding eggs on different groups of beetles; but from a nest into which the wasp was still carrying food we took a half–grown larva which was identified as being hers.
The spider remained alive for six days, and the larva continued to grow for two days longer, when it died also, being at the time about two thirds grown.
The wasp larva did not, as might have been expected, find fault with this arrangement, but proceeded to attack number two with good appetite, ate it all up, and then spun its cocoon as though nothing unpleasant had occurred.
The larva began to eat at once, and devoured all the inside of the thorax and abdomen of the fly to which it was attached, in the first twenty–four hours.
In two or three days the egg hatches, after which the larva spends ten or fifteen days in eating, and then spins its cocoon.
B, Side view of the trochophore larva of Eupomatus uncinatus (from Hatschek).
A, Side view of the larva of Lopadorhynchus (from Kleinenberg), showing the developing trunk region.
The larva as a rule fastens to them branches detached from living colonies of Vorticellid protozoa such as Epistylis[AT].
Hydra in Calcutta is often devoured by the larva of a small midge (Chironomus fasciatipennis, Kieffer) common in the tanks from November to February.
Development goes on within the chamber thus formed until the larva is ready to assume a free life.
Its broad end then affixes itself to some solid object, the polypide is everted through the pore at the narrow end and the whole of that part of the larva which formerly enclosed it is turned completely inside out.
Other animals that may be enemies are a midge larva (Tanypus sp.
The larva thus composed makes its way out of the zooecium, according to Kraepelin through the orifice of a degenerate bud formed for its reception, and swims about for a short time by means of the cilia with which it is covered.
In many cases it is clear that this larva and the sponge grow up together, and the larva is commoner in vigorous than in decayed sponges.
Footnote AT: Further particulars regarding the life-history of this larva will be found on pp.
The larva is often found in considerable numbers clinging to the oscula and wide efferent canals of S.
The larva settles down near the base of its column and commences to spin a tunnel.
The larva has a breathing-tube, and floats head downwards; when disturbed it wriggles to the bottom (Christy).
Alcock (1901) describes from his own observation the newly hatched Phyllosoma larva of Thenus orientalis, Fabricius.
The larvawhen hatched lives on the contents of the grain and undergoes its changes therein.
The larva has no breathing-tube, and floats horizontally at the surface, except when feeding; it does not frequent sewage or foul water.
If it acquires more limbs before exclusion, the youngest larva must stand on the same level as the youngest larva of Euphausia observed by Claus.
The oldest observed larvae (see Figure 33) are characterised by the extraordinary length of the flagella of the outer antennae, and in this respect resemble the larva of Sergestes found by Claus near Messina (Zeitschr.
In the development of the Insecta we never see new segments added to those already present in the youngest larvae, but we do see segments which were distinct in the larva afterwards become fused together or disappear.
Last foot of the middle-body of the larva of Entoniscus Porcellanae, magnified 180 diam.
Older larva produced from the Zoea represented in Figure 32.
The youngest larva from the brood-pouch of the mother already possess THE WHOLE of the thoracic feet; on the other hand, like Spence Bate, I cannot find those of the abdomen.
Like the spinous processes of the Zoeae, the chelae on the penultimate pair of feet of the young Brachyscelus are to be regarded as acquired by the larva itself.
But the larva of the Coleoptera, Lepidoptera, etc.
The primitive body includes the segments which the naupliiform larva brings with it out of the egg; it is afterwards divided, by the younger sections which become developed in its middle, into the head and tail.
The larva is of a dull green colour, with a dark line on the back.
As a rule, the colour of the egg turns darker as the time for the arrival of the infant larva approaches, and you will often be able to see a little brown or black head moving slightly within the 'shell.
It will be seen that thelarva cage just described supplies all these demands, and care must be taken not to disturb the occupants while they are undergoing their metamorphoses.
The larva of Chrysorrh[oe]a is black, with four rows of little wart-like projections on each side, from which proceed little tufts of hairs.
The front of the larva is generally the last portion to become dry, and when this is quite rigid the skin may be removed from the blowpipe.
Other experiences of the larvahunter are equally interesting and, perhaps, even more tantalising.
The troubles and disappointments of larva rearers are numerous and varied, and commence with the earliest moments of the young insects.
The larvais one of the numerous leaf miners, and is of a yellowish colour.
The larva is yellow, dotted with black, with a brownish plate on the second segment.
The larva is dingy white, with brown horny plates on the second, third and fourth segments.
Now take a round ruler, previously covered with blotting paper, and roll the larva gently from head to tail till all the contents of the skin have been expelled.
The larva of the present species is yellowish or greenish, with a row of black spots on the back and a row on each side.
The larva feeds on several trees, including oaks and elms, in the month of May.
It seems somewhat partial to civilised life, for it frequents the streets of our metropolis, even in the very densely populated parts; and the larva is one of the commonest of the insect forms infesting our gardens and squares.
The clay sarcophagus on yonder barn wall shall receive another morsel of preserved meat for a ravenous wasp larva to devour.
The sting of the spider collecting wasps destroys the power of motion, but does not at once kill; it is certainly fatal in the end, if the young wasp larva does not in the meantime eat the victim stored away for her by maternal foresight.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "larva" in a variety of sentences. We hope that you will now be able to make sentences using this word.
