The larval state of a butterfly or any lepidopterous insect; sometimes, but less commonly, the larval state of other insects, as the sawflies, which are also called false caterpillars.
American species) which, in the larval state, devours the leaves of the cabbage and the turnip.
In the Infusoria, and many larval forms, they are locomotive organs.
Aletia argillacea), which in the larval state does great damage to the cotton plant by eating the leaves.
The larval form of a trematode worm having the shape of a tadpole, with its body terminated by a tail-like appendage.
It is formed of threads of silk spun by the worm just before leaving the larval state.
Now these wings and other structures characteristic of the imago, appear in the pupa which is revealed by the shedding of the last larval cuticle.
In all cases indeed we may say that the particular larval form is adapted to the special conditions of life.
In one section of the order, however, the Adephaga comprising the predaceous terrestrial and aquatic beetles, the larval foot has, like that of the adult, two claws.
The last larval instar again has short legs like the grub of the second period.
Among these insects, while the mouth of the imago is of the normal mandibulate type adapted for eating solid food, the larval mouth is constricted and the slender mandibles are grooved for the transmission of liquid food.
The larval cells are shed into the cavity of the stomach and become completely broken down.
A fact of much importance in the transformations of beetles as pointed out by Brauer (1869) is that in a few families, the first larval instar is campodeiform, while the subsequent instars are eruciform.
In this case therefore there may be a series of larval generations, neither pupa nor imago being formed.
The species of Platygaster pass their larval stages within the larvae of gall-midges.
Until the last stage of larval life the wing-bud remains hidden in its pouch, and no cuticle is formed over it.
The male on the other hand passes into a second larval stage in which there are no functional legs, but rudiments of legs and of wings are present on the epidermis beneath the cuticle, as shown by B.
When the pupal stage draws near the bud grows out of its sheath, and projecting from the general surface of the epidermis becomes covered with cuticle to be revealed, as we have seen, after the last larval moult, as the pupal wing.
Known as the Orthorrhapha and the Cyclorrhapha; these terms are derived from the manner in which the larval or pupal cuticle splits, as will be explained in the next chapter (p.
The commercially important king and snow crabs of the eastern Bering Sea also have larval stages that are pelagic (Table 3).
At lower temperatures, the rate of growth is also slower and, therefore, the duration of pelagic larval life is longer for demersal fish and shellfish.
Herring spawn in intertidal and subtidal zones and spend most of their post-larval lives in bays or estuaries near the coast.
For example, the less time it takes the pelagic eggs of demersal fish and shellfish to hatch and complete pelagic larval life, the less is the time they will be preyed on by marine birds.
Predation by marine birds on pelagic eggs and on the larval and juvenile stages of demersal fish is not well documented, probably because the rapid digestion rate of birds makes species identification of these stages difficult.
The larval skin burst open and forth leaped the May fly, like a winged fairy from a prison cell.
They remain in the larval state a year, and some species remain two years.
It finishes its growth in early summer, and emerges from its larval skin as a perfect winged insect.
All of our other insect friends have changed gradually from larval to adult form.
It lives almost three years in the larval state, so you see it has plenty of time in which to grow.
It appears that the surrounding colour affects the caterpillars through the skin during a sensitive period--the twenty hours immediately preceding the last twelve hours of the larval state.
We have seen a British starfish with its fully-formed young ones creeping about on its body, though the usual mode of development for shore starfishes is that the young ones pass through a free-swimming larval period in the open water.
Besides the permanent inhabitants of the open sea, there are the larval stages of many shore-animals which are there only for a short time.
It is a sort of soap made by the activity of small frog-hoppers while they are still in the wingless larval stage, before they begin to hop.
The larval salmon, still being nourished from the yolk-sac (Y.
The bird is chiefly insectivorous and destroys an immense amount of insect life, particularly in the larval state, injurious to vegetation.
In this case there should be only one pair of coelomoducts in the adult, the pair of true nephridia which should also occur being represented by the larval nephridia.
Just behind the ciliated ring is a pair of larval eyes which disappear in the adult; these correspond to the cephalic eyes of Lamellibranchs.
One species Callistochiton viviparus is viviparous and its ova develop without a larval stage in the maternal oviduct.
The second or larval stage of the insect's life is the eating, growing stage.
She cuts a hole in the cap of her cell, sheds her skin for the last time (she did this five or six times during the larval or growing stage), and comes forth.
The larval stage is in the case of many insects the active time when, if they are vegetable feeders, they injure crops.
Some insects pass this third stage inside of silken cases they spin about themselves, others, after shedding the larval skin, find themselves each clad in a sort of horny coat of mail.
The birth and growth of most of the bivalves is similar to this; and it must be remembered that these changing larval forms are hardly large enough to see.
None among them is more active than the larval caddis-flies, or case-worms, as anglers call them.
They disappear after the third month of larval life.
According to Kowalevsky the heart is formed during larval life as an elongated closed sack on the right side of the endostyle.
The body (x) in the figure appears to me without doubt the rudiment of the stolon, and not, as believed by Gegenbaur, the larval tail.
The causes which give rise to a retardation of histological differentiation will be dealt with in the second part of this chapter which deals with larval characters and larval forms.
The praeoral ciliated ring of the Trochosphere is probably directly derived from the ciliated ring of Pilidium, which is itself the original ring of the prototype of all these larval forms.
But little is known with reference to the ontogeny of the lymphatic vessels, but they originate late in larval life, and have at first the form of simple intercellular spaces.
The relationships of the six types of larval forms thus briefly characterised have been the subject of a considerable amount of controversy, and the following suggestions on their affinities must be viewed as somewhat speculative.
A functionally hexapodous larval form is common to all the Chilognatha (vol.
The embryological evidence is insufficient to decide whether the amphiblastula larva is, as suggested above, to be regarded as the larval ancestor of the Porifera.
I should however be inclined to suggest that the eye had in this case ceased for a period to be employed; and that it has been re-developed again in some of the larval forms.
But there is little direct proof of such relation, and the resemblance of larval flounders to the ribbon-fishes may have equal significance.
In no adult sponge do the collar-cells completely cover the whole of the internal surface, the olynthus being a larval form, and by no means a commonlarval form.
In the early stages of its larval life this insect wanders free among communities of protozoa (Vorticella, Epistylis, &c.
Evans's account of thelarval development of Spongilla lacustris in the Q.
The life-history of urchins closely resembles that of starfishes, for the young are free-swimming creatures of an easel-like form, and during this early larval existence their bodies are supported by a calcareous skeleton.
As with the last order, some degenerate from the comparatively complicated free-swimming and eyed larval state to blind and limbless parasites that feed on the bodies of fishes and are known as fish lice.
The larval forms of the type genus Cerianthus float freely in the sea, and were once considered to belong to a separate genus, Arachnactis.
Two larval Ixodid ticks, Ixodes possibly cookei, were removed from the pinnae of the ears of a specimen of cansensis from the type locality, 4 mi.
Four larval Ixodid ticks, Dermacentor possibly variabilis, were removed from the pinnae of the ears of a live specimen of cansensis from 3 mi.
Insects, in the larval state, are worm-like in form.
The frog is tailed in the larval condition, because its ancestors were tailed amphibians.
And, if it were a mere fal-lal, a furbelow of larval coquetry, even that would not surprise me.
In the midst of innumerable little sacs of adipose tissue is buried a thin thread in which we easily recognize the essential features of the digestive apparatus, both of the preceding larval form and of the perfect insect.
This naked journey over the leaves, the last joy of its larval life, is fatal to the traveller.
The first hatching, that of the normal egg, makes the Meloid go through the larval dimorphism of the Anthrax and the Leucospis.
It belongs to the Tachina group, who, in their larval form, so often inhabit the bodies of caterpillars.
Let us consider more particularly the female, who, while retaining her larval shape, becomes marriageable and glows at her best during the hottest part of summer.
Wings and flight there will be none: the female retains her humble larval form, but she kindles her blazing beacon.
I was at that time busy with the Hunting Wasps, following their larval development from the egg to the cocoon.
I have observed them in many other insects, either in the larval or in the perfect state; but in this respect there is none to equal the grub of the game-hunting Wasp, which is all speckled with white.
A few larval forms found on various snakes have been reported under the generic name Ixodes, but they probably belong either to Amblyomma or Aponomma.
In winter when fishing may be poor, it may be constrained to dig out the mole and the vole from their underground retreats to provide a meal, and is even glad of hibernating insects, either in the larval or pupal condition.
The manner in which such folding occurs is to be observed in the higher study of larval morphology.
A peculiar larval form of Phoronis, a genus of marine worms, having a circle of ciliated tentacles.
A lepidopterous insect, which in the larval state often travels in great multitudes from field to field, destroying grass, grain, and other crops.
A genus of small beetles, several of which, in the larval state, are very destructive to woolen goods, fur, etc.
The Lepidoptera undergo a complete larval metamorphosis, and the process is more familiar to general readers than in the case of other insects.
All frogs and toads are flesh eaters, mainly of worms and insects and larvalor small water animals; but the big species, such as the bullfrog, may seize prey of considerable size as it comes within reach, such as young ducklings.
In most cases the mollusks secrete from a larval gland an external shell which serves as skeleton and defensive armor; are bisexual and produce eggs, or if monoecious are never self-fertilizing.
It is rarely enclosed in a cocoon but lies buried in the ground, floats in the water, or is protected by the last larval skin which, separating from the pupa skin, remains around it as a hard case.
Some interesting variations in this rather commonplace larval history occur, however, in certain families.
They are wingless, very simple in organization, and without any larval metamorphosis.
Their method of life is to deposit their eggs on or in the bodies of other insects, usually in the larval stage, where they hatch and thrive by the slow death of the host.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "larval" in a variety of sentences. We hope that you will now be able to make sentences using this word.
