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The female woolly aphid larva (Schizoneura lanigera), a species of plant lice of the Eriostoma family.

Woolly Aphid Larva

The female woolly aphid larva (Schizoneura lanigera), a species of plant lice of the Eriostoma family.

The Grapevine Flea Beetle (Altica chalybea). "a, leaf infested with larvae; b, larva; c, cocoon; d, beetle." -Whitney, 1911

Grapevine Flea Beetle

The Grapevine Flea Beetle (Altica chalybea). "a, leaf infested with larvae; b, larva; c, cocoon; d,…

"Elaphidion parallelum ... a, larva; b, twig split open, showing inclosed pupa; k, severed end of twig; c, beetle; i, basal joints of an antenna, showing the characteristic spines at the tip of the third and fourth joints; j, tip of elytron; d, e, f, g, h, head, maxilla, labium, mandible, and antenna of larva." -Whitney, 1911

Long-Horned Beetle

"Elaphidion parallelum ... a, larva; b, twig split open, showing inclosed pupa; k, severed end of twig;…

Water beetles carry air bubbles under their abdomens, which provides an air supply. Water beetle larvae dwell at the bottom of ponds.

Water Beetle Larva

Water beetles carry air bubbles under their abdomens, which provides an air supply. Water beetle larvae…

Also called Sexton Beetles, these beetles bury the carcasses of small vertebrates as food for their larvae. This illustration shows four beetles, one flying, working to bury a dead bird on its back.

Burying Beetles, Burying a Dead Bird

Also called Sexton Beetles, these beetles bury the carcasses of small vertebrates as food for their…

Also known as Pieris brassicae. An image of the larva and pupa of the large white cabbage butterfly.

Larva and Pupa of a Large White Cabbage Butterfly

Also known as Pieris brassicae. An image of the larva and pupa of the large white cabbage butterfly.

When clear wing moths are larvae they live in burrows, in the roots and stems of many plants, and often do considerable damage.

Clear Wing Moth

When clear wing moths are larvae they live in burrows, in the roots and stems of many plants, and often…

Copepoda, an order of Crustacea. A, cyclops quiadricornis; b, c, d, stages of growth in larvae.

Copepoda

Copepoda, an order of Crustacea. A, cyclops quiadricornis; b, c, d, stages of growth in larvae.

"They are small hump-backed gnats, of a gray or blackish color, with broad pale wings." &mdash;Whitney, 1889 <p>This is a dorsal view of the larva, with fan-shaped appendages spread.

Fish-Killing Buffalo Gnat Larva

"They are small hump-backed gnats, of a gray or blackish color, with broad pale wings." —Whitney,…

Flat-Headed Borer is the common name of <I>Chalcophora virginiensis</I>. The insect extendsd its flattened burrows deep into the wood of the tree. The larvae grow to the length of two inches.

Flat-Headed Borer

Flat-Headed Borer is the common name of Chalcophora virginiensis. The insect extendsd its flattened…

The full grown larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry. 'a' shows the mouth hooks.

Sheep Bot Fly

The full grown larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies…

The full grown larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry. 'b' shows anal appendages.

Sheep Bot Fly

The full grown larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies…

The young larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and is known as a major pest in the Australian sheep industry. 'b' shows anal appendages.

Sheep Bot Fly

The young larva of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies and…

This illustration shows the Gadfly of the Ox. This illustration is enlarged, and also shows a Gadfly larvae.

Gadfly of Ox

This illustration shows the Gadfly of the Ox. This illustration is enlarged, and also shows a Gadfly…

The Gadfly of the sheep lays its eggs in the nostrils of the sheep. There, the maggots hatch and live in the frontal sinuses until fully grown, they then drop to the ground and bury themselves. After pupation, they emerge as flies. This illustration is natural size and shows a Gadfly larvae.

Gadfly of Sheep

The Gadfly of the sheep lays its eggs in the nostrils of the sheep. There, the maggots hatch and live…

Gall-fly is a name applied to the members of the family Cynipidae, which are not flies, but are related to ants and bees (order Hymenoptera).

Gall-fly

Gall-fly is a name applied to the members of the family Cynipidae, which are not flies, but are related…

Gooseberry Caterpillar is the name applied to the larvæ of two different insects, both injurious to gooseberry and currant bushes. (1) the Magpie Moth (Abraxas grossulariata), appearing about midsummer, has usually a black head, yellow body, and white wings spotted with black. (2) More destructive than the above is the larva of the Gooseberry Sawfly (Nematus ribesii), which plays havoc with the leaves of bushes. The larva is bluish green, with lack head, feet, tail, and spots, with twenty feet, and a length of about 3/4 of an inch when full grown.

Gooseberry Caterpillar (Nematus ribesii) and Sawfly

Gooseberry Caterpillar is the name applied to the larvæ of two different insects, both injurious to…

Larva of the dobson.

Hellgrammite

Larva of the dobson.

Pupa of the dobson.

Hellgrammite

Pupa of the dobson.

The male adult of the dobson.

Hellgrammite

The male adult of the dobson.

The head of the female dobson.

Hellgrammite

The head of the female dobson.

<em>Tremex columba</em>, larva with young larva of Thalessa fastened to its side.

Pigeon Horntail

Tremex columba, larva with young larva of Thalessa fastened to its side.

<em>Tremex columba</em>, head of larva.

Pigeon Horntail

Tremex columba, head of larva.

Bombyx Neustria, or the lackey moth, lay their eggs on the twigs of various trees. When the larvae emerge they are black.

Lackey Moth

Bombyx Neustria, or the lackey moth, lay their eggs on the twigs of various trees. When the larvae emerge…

The larvae of the lily beetle live on lilies, devouring their leaves. The antennae are on the front of the head of the beetle.

Eggs, Larvae, and Perfect Insect of the Lily Beetle

The larvae of the lily beetle live on lilies, devouring their leaves. The antennae are on the front…

Lyda is a genus of sawflies. Lyda pyri injure plums and other stone fruit trees. The habits of the larvae facilitate the destruction of the trees.

Larvae and Web of Lyda Pyri

Lyda is a genus of sawflies. Lyda pyri injure plums and other stone fruit trees. The habits of the larvae…

"Seed-corn Maggot (Phorbia fusciceps). a, maggot; b, pupa. Kernels of Maize, showing work of the maggot." -Whitney, 1911

Seed-Corn Maggot

"Seed-corn Maggot (Phorbia fusciceps). a, maggot; b, pupa. Kernels of Maize, showing work of the maggot."…

"A genus of moths, family Bombycid&aelig;, established by Hubner in 1816."-Whitney, 1902

Maple-Worm

"A genus of moths, family Bombycidæ, established by Hubner in 1816."-Whitney, 1902

The larva of the Grapevine Root Borer (Memthyrus polistiformis).

Grapevine Root Borer (Larva)

The larva of the Grapevine Root Borer (Memthyrus polistiformis).

<i>Sipunculus nudus</i>. A species of unsegmented marine worm, commonly called the peanut worm. "B, Larval Sipunculus, about one twelfth of an inch long. o, mouth; oe, esophagus; s, caecal gland; i1, intestine with masses of fatty cells; a, anus; w, ciliated groove of intestine; g, brain with two pairs of red eye-spots; n, nervous cord; p, pore; t, t1, so-called testes; W, W, circlet of cilia." &mdash;Whitney, 1889

Peanut Worm - Interior Anatomy of Larva

Sipunculus nudus. A species of unsegmented marine worm, commonly called the peanut worm. "B, Larval…

Larvae of butterflies, moths, and sawflies are called caterpillars.

Larvae of a Rose Leaf Sawfly

Larvae of butterflies, moths, and sawflies are called caterpillars.

A parasite which feeds as larvae in rose-twigs or upon the leaves. Some species are confined to roses for their food, while others can also feed on other plants.

Larvae of Rose Sawfly

A parasite which feeds as larvae in rose-twigs or upon the leaves. Some species are confined to roses…

The larvae of a scale

Scale

The larvae of a scale

An adult male scale

Scale

An adult male scale

"Resplendent Shield-bearer (Coptodisca splendoriferella). a, leaf of apple showing work; b, summer larva; c, larva in case, traveling; d, cases tied up for winter; e, hibernating larva; f, pupa; g, moth; h, parasite: all enlarged." -Whitney, 1911

Resplendent Shield Bearer

"Resplendent Shield-bearer (Coptodisca splendoriferella). a, leaf of apple showing work; b, summer larva;…

Silkworms are the larvae of moths that spin silken cocoons.

Silkworm

Silkworms are the larvae of moths that spin silken cocoons.

Silkworms are the larvae of moths that spin silken cocoons.

Silkworm

Silkworms are the larvae of moths that spin silken cocoons.

Wire worm (the larvae of click beetles).

Wire Worm

Wire worm (the larvae of click beetles).