Search the Dictionary

thorax only by a constriction. Coarctate pupa (Zoöl.), a pupa closely covered by the old larval skin, as in most Diptera.

chrysalis state. It is formed of threads of silk spun by the worm just before leaving the larval state. From these the silk of commerce is prepared.

t an apple. Shak. Codling moth (Zoöl.), a small moth (Carpocapsa Pomonella), which in the larval state (known as the apple worm) lives in apples, often doing great damage to the crop.

The larval stage of a tapeworm (Tænia coenurus) which forms bladderlike sacs in the brain of sheep, causing the fatal disease known as water brain, vertigo, staggers or gid.

See Larvalla.

Gladiolus; -- called also sword lily. -- Corn fly. (Zoöl.) (a) A small fly which, in the larval state, is injurious to grain, living in the stalk, and causing the disease called "gout," on account of the swelled joints. The common European species is Chlorops tæniopus. (b) A small fly (Anthomyia ze) whose larva or mag…

er which unites with the hepatic to form the common bile duct. -- Cystic worm (Zoöl.), a larval tape worm, as the cysticercus and echinococcus.

The larval form of a tapeworm, having the head and neck of a tapeworm attached to a saclike body filled with fluid; -- called also bladder worm, hydatid, and measle (as, pork measle).

the genus Ephemera and related genera, of many species, and inhabiting fresh water in the larval state; the ephemeral fly; -- so called because it commonly lives but one day in the winged or adult state. See Ephemeral fly, under Ephemeral.

various organs, but especially in the liver and lungs, which often cause death. It is the larval stage of the Tænia echinococcus, a small tapeworm peculiar to the dog.

A process by which many internal parasites, esp. in their larval states, become inclosed within a cyst in the muscles, liver, etc. See Trichina.

An insect in the larval state; a caterpillar; a larva.

Alypia and allied genera; as, the eight-spotted forester (A. octomaculata), which in the larval state is injurious to the grapevine.

A primeval larval form; a double-walled sac from which, according to the hypothesis of Haeckel, man and all other animals, that in the first stages of their individual evolution pass through a two-layered structural stage, or gastrula form, must have descended. This idea constitutes the Gastræa theory of Haeckel. See G…

The larval state (Phyllosoma) of the genus Palinurus and allied genera. It is remarkable for its strange outlines, thinness, and transparency. See Phyllosoma.

rer. -- Grape curculio (Zoöl.), a minute black weevil (Craponius inæqualis) which in the larval state eats the interior of grapes. -- Grape flower, or Grape hyacinth (Bot.), a liliaceous plant (Muscari racemosum) with small blue globular flowers in a dense raceme. -- Grape fungus (Bot.), a fungus (Oidium Tuckeri) on…

uropean species (O. vulgaris). -- Hop moth (Zoöl.), a moth (Hypena humuli), which in the larval state is very injurious to hop vines. -- Hop picker, one who picks hops. -- Hop pole, a pole used to support hop vines. -- Hop tree (Bot.), a small American tree (Ptelia trifoliata), having broad, flattened fruit in larg…

imals, but unconnected with the tissues. It is usually formed by parasitic worms, esp. by larval tapeworms, as Echinococcus and Coenurus. See these words in the Vocabulary. Hydatid of Morgagni (Anat.), one of the small pedunculated bodies found between the testicle and the head of the epididymis, and supposed to be a r…

iner (Zoöl.), any one of various small lepidopterous and dipterous insects, which, in the larval stages, burrow in and eat the parenchyma of leaves; as, the pear-tree leaf miner (Lithocolletis geminatella). -- Leaf notcher (Zoöl.), a pale bluish green beetle (Artipus Floridanus), which, in Florida, eats the edges of t…

a large number of species, in which the antennæ are very long. Most of them, while in the larval state, bore into the wood or beneath the bark of trees, and some species are very destructive to fruit and shade trees. See Apple borer, under Apple, and Locust beetle, under Locust.