"Firefly or lightning bug larva" — Davison, 1906

Larval Firefly

"Firefly or lightning bug larva" — Davison, 1906

An illustration of the larva of a common flea. Flea larvae emerge from the eggs to feed on any available organic material such as dead insects, feces and vegetable matter. They are blind and avoid sunlight, keeping to dark places like sand, cracks and crevices, and bedding. Given an adequate supply of food, larvae should pupate within 1-2 weeks. After going through three larval stages they spin a silken cocoon.

Flea Larva

An illustration of the larva of a common flea. Flea larvae emerge from the eggs to feed on any available…

An illustration of a single fly larva.

Fly Larva

An illustration of a single fly larva.

The larva of Efferia aestuans (or Erax bastardi), an insect in the Asilidae family of robber flies.

Robber Fly Larva

The larva of Efferia aestuans (or Erax bastardi), an insect in the Asilidae family of robber flies.

"After attaching themselves to the walls of the stomach, the botfly larva are nourished by the blood and lymph of the host until the following spring, when they pass on through the canal, burrow through the ground, and transform into the adult about two weeks later." — Davison, 1906

Botfly Larva

"After attaching themselves to the walls of the stomach, the botfly larva are nourished by the blood…

"a, eggs of the Breeze-fly; b, the same magnified; c, larva, or bot; d, chrysalis; e, perfect insect; f, female depositing her eggs" — Goodrich, 1859

Breeze Fly

"a, eggs of the Breeze-fly; b, the same magnified; c, larva, or bot; d, chrysalis; e, perfect insect;…

A caddice-fly larva.

Caddice Fly

A caddice-fly larva.

An adult caddice-fly

Caddice Fly

An adult caddice-fly

"Crane-fly (Tipula oleracea): a, eggs; b, larva; c, pupa case as left by the insect, sticking out of the eath; d, perfect insect." — Chambers' Encyclopedia, 1875

Crane Fly

"Crane-fly (Tipula oleracea): a, eggs; b, larva; c, pupa case as left by the insect, sticking out of…

"Sarracenia Flesh-fly (Sarcophaga sarraceniae). a, larva; b, pupa; c, fly; d, head and prothoracic joints of larva, showing curved hooks, lower lip, and prothoracic spiracles; e, end of body of larva, showing stigmata, prolegs, and vent; h, tarsal claws of fly with protecting pads; i, antenna of fly." -Whitney, 1911

Sarracenia Flesh Fly

"Sarracenia Flesh-fly (Sarcophaga sarraceniae). a, larva; b, pupa; c, fly; d, head and prothoracic joints…

Now known as Mayetiola destructor: "Hessian Fly (Cecidomyia destructor). a, larva; b, pupa; c, infested stalk of wheat." -Whitney, 1911

Stages of the Hessian Fly

Now known as Mayetiola destructor: "Hessian Fly (Cecidomyia destructor). a, larva; b, pupa; c, infested…

The head of the larva of the horse fly.

Horse Fly

The head of the larva of the horse fly.

The larva of the horse fly.

Horse Fly

The larva of the horse fly.

The larva of the horse fly.

Horse Fly

The larva of the horse fly.

A species common to the United States and often found to be benificial in agriculture.

Lacewing Fly

A species common to the United States and often found to be benificial in agriculture.

The underside of the pupe of a house fly.

Pupa of House Fly

The underside of the pupe of a house fly.

Cephus Pygmaeus, wheat-stem saw-fly, outline of larva.

Saw Wheat-Stem Fly

Cephus Pygmaeus, wheat-stem saw-fly, outline of larva.

Cephus Pygmaeus, wheat-stem saw-fly, larva.

Saw Wheat-Stem Fly

Cephus Pygmaeus, wheat-stem saw-fly, larva.

Cephus Pygmaeus, wheat-stem saw-fly, larva in wheat stalk.

Saw Wheat-Stem Fly

Cephus Pygmaeus, wheat-stem saw-fly, larva in wheat stalk.

Frog hoppers belong to the order Heteroptera. This order is also known as plant bugs. These insects are very small.

Larva, Frothy Section, and Perfect Insect of the Frog Hopper

Frog hoppers belong to the order Heteroptera. This order is also known as plant bugs. These insects…

"Frog Hoppers are ranked under the homopterous sub-order of insects. The name of frog hopper refers partly to the form of their body, partly to their leaping powers, which are great; this power arises from the length of their hind legs. The larva of these insects, which resembles the parent in most respects except in the want of wings, envelops itself in a froth resembling human spittle. All must have often observed ths on plants."—(Charles Leonard-Stuart, 1911)

Larval Frog Hopper

"Frog Hoppers are ranked under the homopterous sub-order of insects. The name of frog hopper refers…

Frog hopper belong to the same order as aphidoe, to the section which has the leathery upper wings. It is the larva of the frog hoppers the produce a frothy secretion referred to as frog spit or cuckoo spit.  This secretion is harmful to plants.

Larva, Frothy Secretion, and Perfect Insect of the Frog Hopper

Frog hopper belong to the same order as aphidoe, to the section which has the leathery upper wings.…

"Grape Gall-louse (Phylloxera vastatrix), the small figures showing natural sizes. Larva as it appears when hibernating." -Whitney, 1911

Grape Gall Louse Larva

"Grape Gall-louse (Phylloxera vastatrix), the small figures showing natural sizes. Larva as it appears…

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…

"The Geometrina in the larval condition have only four prolegs, the usual number being ten, and in moving these are brought close up to the last pair of thoracic limbs, thus giving the caterpillar a looped appearance, hence the term "loopers" usually applied to these moths; they then hold on by the prolegs, and releasing those in front carry the body forward until the arched appearance is gone. They thus move by an alternate process of looping and straightening their bodies. The larva of Geometers have also the curious havit of fixing themselves by their hind feet to the branch of a shrub, throwing the remainder of their bodies out, and remaining motionless in this position for hours, thus exhibiting an enormous amount of muscular energy." — Encyclopedia Britanica; 1893

Geometrina

"The Geometrina in the larval condition have only four prolegs, the usual number being ten, and in moving…

"The Geometrina in the larval condition have only four prolegs, the usual number being ten, and in moving these are brought close up to the last pair of thoracic limbs, thus giving the caterpillar a looped appearance, hence the term "loopers" usually applied to these moths; they then hold on by the prolegs, and releasing those in front carry the body forward until the arched appearance is gone. They thus move by an alternate process of looping and straightening their bodies. The larva of Geometers have also the curious havit of fixing themselves by their hind feet to the branch of a shrub, throwing the remainder of their bodies out, and remaining motionless in this position for hours, thus exhibiting an enormous amount of muscular energy." — Encyclopedia Britanica; 1893

Geometrina

"The Geometrina in the larval condition have only four prolegs, the usual number being ten, and in moving…

Various species of insect larva which glow through bioluminescence.

Glowworm

Various species of insect larva which glow through bioluminescence.

The larva is curious little creatures, living under water in rather swiftly flowing streams, clinging to rocks, sticks, or logs, and feeding upon vegetable matter.

Buffalo Gnat Larva

The larva is curious little creatures, living under water in rather swiftly flowing streams, clinging…

The larva of the Sciara tritici

Fungus Gnat

The larva of the Sciara tritici

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…

The grub is the larva of a beetle.

Grub

The grub is the larva of a beetle.

An illustration of the larval form of the Holothuria tubulosa, sea cucumber.

Holothuria Tubulosa (Larva)

An illustration of the larval form of the Holothuria tubulosa, sea cucumber.

Illustrated are the four stages in an insects' life: egg, larva, pupa, imago. The insect pictured is the codlin moth.

Insect Life Stages

Illustrated are the four stages in an insects' life: egg, larva, pupa, imago. The insect pictured is…

"Ladybird beetle; larva." —Davison, 1906

Ladybird

"Ladybird beetle; larva." —Davison, 1906

"Asiatic ladybird imported to devour the San Jose scale; larva." —Davison, 1906

Asiatic Ladybird

"Asiatic ladybird imported to devour the San Jose scale; larva." —Davison, 1906

Ladybirds and their larva are beneficial to gardens because they eat other insects as food.

Larva of a Ladybird

Ladybirds and their larva are beneficial to gardens because they eat other insects as food.

Also known as megilla maculata. A-Larva; B-Empty skin; C-Beetle with enlarged antenna above.

Spotted Ladybird

Also known as megilla maculata. A-Larva; B-Empty skin; C-Beetle with enlarged antenna above.

A genus of fireflies. Their larva are known as glowworms.

Lampyris Savignii

A genus of fireflies. Their larva are known as glowworms.

Larva, the second stage of the lace-wing fly.

Larva

Larva, the second stage of the lace-wing fly.

The larva of a weevil. A larva is a juvenile form of animal with indirect development, undergoing metamorphosis.

Larva

The larva of a weevil. A larva is a juvenile form of animal with indirect development, undergoing metamorphosis.

Beetle larva.

Larva

Beetle larva.

The larva of a weevil in a chestnut. A larva is a juvenile form of animal with indirect development, undergoing metamorphosis.

Larva in Chestnut

The larva of a weevil in a chestnut. A larva is a juvenile form of animal with indirect development,…

Goat moth caterpillars are destructive to timber and fruit trees. When fully grown the caterpillar is four inches long.

Larva of Goat Moth

Goat moth caterpillars are destructive to timber and fruit trees. When fully grown the caterpillar is…

Mealworms are the larva form of the mealworm beetle, Tenebrio molitor, a species of darkling beetle. Like all holometabolic insects, they go through four life-stages: egg, larva, pupa, and adult. Larvae typically measure about 2.5 cm or more, whereas adults are generally between 1.25 and 1.8 cm in length.

Mealworm Larva

Mealworms are the larva form of the mealworm beetle, Tenebrio molitor, a species of darkling beetle.…

The larva, or caterpillar, of the leopard moth is whitish with black glossy spots. The caterpillar has a blackish plate on the segment next to the head. These caterpillars feed on the wood in the interior of the stems and branches of pear, apple, or plum trees.

Caterpillar of the Leopard Moth

The larva, or caterpillar, of the leopard moth is whitish with black glossy spots. The caterpillar has…

Larva are unlike the mature insect. Larva of the moth or butterfly resemble worms. It may have a distinct head and the rings of the body may differ in the three immediately behind the head.

Larva of a Leopard Moth

Larva are unlike the mature insect. Larva of the moth or butterfly resemble worms. It may have a distinct…

Larva of lobster removed from egg shell.

Lobster

Larva of lobster removed from egg shell.

"Young louse." — Davison, 1906

Wheat Plant Louse

"Young louse." — Davison, 1906

A maggot is the larva of a dipterous insect.

Maggot

A maggot is the larva of a dipterous insect.

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

Maple-Worm

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

Meal Worm, Larva of a Flour Beetle.

Mealworm

Meal Worm, Larva of a Flour Beetle.

Metamorphosis of the mosquito, larva

Mosquito

Metamorphosis of the mosquito, larva

Metamorphosis of the mosquito, pupa

Mosquito

Metamorphosis of the mosquito, pupa

Larva of the yellow fever mosquito.

Larva of the Yellow Fever Mosquito

Larva of the yellow fever mosquito.

"Mamestra legitima: a, adult; b, larva from above; c, same from side; d, head of same from front; e, pupa." -Department of Agriculture, 1899

Moth Stages

"Mamestra legitima: a, adult; b, larva from above; c, same from side; d, head of same from front; e,…

"Buffalo moth or carpet beetle; larva." —Davison, 1906

Buffalo Moth

"Buffalo moth or carpet beetle; larva." —Davison, 1906

"Buffalo moth or carpet beetle; pupa within larva skin." —Davison, 1906

Buffalo Moth

"Buffalo moth or carpet beetle; pupa within larva skin." —Davison, 1906

An illustration of the larva of a ceropia moth. The cecropia moth is one of the largest moths found in North America. It is a member of the Saturniidae family, or giant silk moths. Females with a wingspan of 130 mm or more have been documented. It is found as far west as the Rocky Mountains and north into the maritime provinces of Canada. The larvae of these moths are most commonly found on Maple trees, but they have been known to feed on Wild Cherry and Birch trees among many others.

Larva of Cecropia Moth

An illustration of the larva of a ceropia moth. The cecropia moth is one of the largest moths found…

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

Grapevine Root Borer (Larva)

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

A moth which lays its eggs on young cucumbers and other cucurbitaceous plants.

Pickle Worm Moth

A moth which lays its eggs on young cucumbers and other cucurbitaceous plants.