It bores through and enters the developing seed, where it undergoes a moult and becomes legless.
1175?) as an abusive name given by the French to the Normans: "Moult on Franchois Normans laidis et de meffais et de mesdis.
Bursa, however, the moult that FIG.
He cites Groom's evidence that larvae obtained from the egg readily go through one moult in the aquarium, and the known fact that the last larval stage is.
Riley, who finds that the young larva, hatched from the egg laid on the pod, has three pairs of legs, and that these are lost after the moult that occurs when the grub has bored its way into the seed.
The sub-imago of the Ephemeroptera suggests that a moult, after the wings had become functional, was at one time general among the Hexapoda, and that the resting nymph of the Thysanoptera or the pupa of the Endopterygota represents a formerly active stage in the life-history.
As growth proceeds the integument is periodically cast; and at the final moult the perfect winged insect appears.
10) is a larva differing markedly in form from its parent, and adapted for a different mode of life, while the nymph before the final moult is sluggish and inactive.
They moult five times, becoming with each change of skin darker in colour; in about three weeks they become adult and capable of laying parthenogenetic eggs.
Here it undergoes its fifth and last moult, and appears as a winged female, capable of reproducing parthenogenetically.
The female is drab, but shows the same white markings as the male, and the young males resemble the females until after the first autumn moult, when they gradually assume the plumage of their sex.
Certain races moult or cast their skin three times during their larval existence, but for the most part the silkworm moults four times - about the sixth, tenth, fifteenth and twenty-third days after hatching.
The amount of nourishment required for this rearing is as follows: hatching to first moult, about 9 lb of leaves of tender growth, equal to 40 to 45 lb ripe leaves; first to second moult, 24 lb, representing roc) lb ripe leaves; second to third moult, 80 lb, representing 240 lb ripe leaves; third to fourth moult, 236 lb, representing 472 lb ripe leaves; fourth moult to mounting, 1430 lb, representing 1540 lb ripe leaves, totalling to about one ton of ripe leaves for a complete rearing.
It often appears before or after the first moult, but it is only after the fourth that it appears in a more developed form.
It invariably happens during the most active period of feeding, three or four days after the fourth moult up to the rising, and generally appears after a meal of coarse leaves, obtained from mulberries pruned the same year and growing in damp soil.
After the first moult the difference between the sexes is shown by the hens inclining to yellowish-green, while the cocks become diversified by orange-yellow and red, their plumage finally deepening into a rich crimson-red, varied in places by a flamecolour.
In the former case it contains numerous grains of sand which are introduced by the animal itself after each moult and which are supposed to act as otoliths.
The newly hatched insect closely resembles the parent, and the wing-rudiments appear externally on the second and third thoracic segments; but before the final moult the nymph remains quiescent, taking no food.
After another moult the insect passes into the passive nymphal or " pupal " stage, during which it takes no food and rests in some safe hiding-place, such as the soil at the base of its food-plant or the hollow of a leaf-stalk.
After the second larval moult, he passes through a passive stage comparable to the pupa-stadium of an b insect, and during this stage, which occurs inside the root, the reproductive organs are perfected.
Carried to the bee's nest, it undergoes a moult, and becomes a fat-bodied grub, ready to lead a quiet life feeding on the bee's rich food-stores.
The triungulin searches for the eggs, and, after a moult, becomes changed into a soft-skinned tapering larva.
Clinging to her hairs they are carried to the nest, where they bore into the body of a bee or wasp larva, and after a moult become soft-skinned legless maggots.
22) of the two hinder thoracic segments and are visible externally throughout the life-history, becoming larger after each moult or casting of the cuticle.
Before a moult actually occurs the cuticle becomes separated from its connexion with the underlying hypodermis.
It is only at the final moult that the sexual organs are mature, the two sexes being alike in the earlier stages of growth.
This final moult is effected soon after the insect's appearance in the winged form; the creature seeks a temporary resting-place, the pellicle splits down the back, and the now perfect insect comes forth, often differing very greatly in colours and markings from the condition in which it was only a few moments before.
Of particular zoological interest in this connexion is a Ceylonese genus Dyscritina, in which the cercopods are long, many-jointed and filiform during the early stages of growth, and only assume at the last moult the forcipate structure characteristic of the family.
In the case of the Norway hare, it has been stated that a general moult, including all the hairs and under fur, takes place and new white hairs are substituted.
In the fall the loon (Colymbus glacialis) came, as usual, to moult and bathe in the pond, making the woods ring with his wild laughter before I had risen.