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A form of the larva of certain Discophora in a state of development succeeding the scyphistoma. The body of the strobila becomes elongated, and subdivides transversely into a series of lobate segments which eventually become ephyræ, or young medusæ.

A genus of minute insects parasitic, in their larval state, on bees and wasps. It is the typical genus of the group Strepsiptera, formerly considered a distinct order, but now generally referred to the Coleoptera. See Strepsiptera.

A kind of worm or larva. Walton.

its height, or for marking a line parallel with a surface. -- Surface grub (Zoöl.), the larva of the great yellow underwing moth (Triphoena pronuba). It is often destructive to the roots of grasses and other plants. -- Surface plate (Mach.), a plate having an accurately dressed flat surface, used as a standard of fl…

The young aquatic larva of any amphibian. In this stage it breathes by means of external or internal gills, is at first destitute of legs, and has a finlike tail. Called also polliwig, polliwog, porwiggle, or purwiggy.

A destructive parasitic worm or insect larva.

A small black dermestoid beetle (Attagenus piceus) whose larva feeds on tapestry, carpets, silk, fur, flour, and various other goods.

An annelid larva having telotrochal bands of cilia.

the species are very destructive to fruit trees. The most common American species is the larva of a bombycid moth (Clisiocampa Americana). Called also lackery caterpillar, and webworm.

Thistle butterfly (Zoöl.), a handsomely colored American butterfly (Vanessa cardui) whose larva feeds upon thistles; -- called also painted lady. -- Thistle cock (Zoöl.), the corn bunting (Emberiza militaria). [Prov. Eng.] -- Thistle crown, a gold coin of England of the reign of James I., worth four shillings. -- Thi…

hunderstone. Thunderbolt beetle (Zoöl.), a long-horned beetle (Arhopalus fulminans) whose larva bores in the trunk of oak and chestnut trees. It is brownish and bluish-black, with W-shaped whitish or silvery markings on the elytra.

, below. Bacon. -- Timber tree, a tree suitable for timber. -- Timber worm (Zoöl.), any larval insect which burrows in timber. -- Timber yard, a yard or place where timber is deposited.

ug for pressing down the tobacco in a pipe as it is smoked. -- Tobacco worm (Zoöl.), the larva of a large hawk moth (Sphinx, or Phlegethontius, Carolina). It is dark green, with seven oblique white stripes bordered above with dark brown on each side of the body. It feeds upon the leaves of tobacco and tomato plants, a…

es of grapevines. They are yellowish green, somewhat tinged with red, and produced by the larva of a small two-winged fly (Lasioptera vitis). -- Tomato sphinx (Zoöl.), the adult or imago of the tomato worm. It closely resembles the tobacco hawk moth. Called also tomato hawk moth. See Illust. of Hawk moth. -- Tomato w…

The peculiar free swimming larva of Balanoglossus. See Illust. in Append.

red butterflies of the genus Aglais, as A. Milberti, and A. urticæ, both of which, in the larva state, feed upon nettles. -- Tortoise-shell turtle (Zoöl.), the hawkbill turtle. See Hawkbill.

of life, as in the development of the germ into the embryo, the egg into the animal, the larva into the insect (metamorphosis), etc.; also, the change which the histological units of a tissue are prone to undergo. See Metamorphosis.

holes which she bores in the trunks of trees with her large and long ovipositor, and the larva bores in the wood. See Illust. of Horntail.

A small, slender nematoid worm (Trichina spiralis) which, in the larval state, is parasitic, often in immense numbers, in the voluntary muscles of man, the hog, and many other animals. When insufficiently cooked meat containing the larvæ is swallowed by man, they are liberated and rapidly become adult, pair, and the ov…

The active young larva of any oil beetle. It has feet armed with three claws, and is parasitic on bees. See Illust. of Oil beetle, under Oil.