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"A genus of moths belonging to the family Zygænidæ, founded by clemens in 1862.They are small and delicate and of somber colors."-Whitney, 1902

Acoloithus

"A genus of moths belonging to the family Zygænidæ, founded by clemens in 1862.They are…

"The cocoons represent the pupa stage; they are commonly called ant-eggs, and are carefully tended by the workers."

Red Wood Ant Pupae (bottom)

"The cocoons represent the pupa stage; they are commonly called ant-eggs, and are carefully tended by…

"The cocoons represent the pupa stage; they are commonly called ant-eggs, and are carefully tended by the workers."

Red Wood Ant Pupae (side)

"The cocoons represent the pupa stage; they are commonly called ant-eggs, and are carefully tended by…

While the pupae are in the cocoon, they are incased in a shelter, often called an ant-house.

Red Wood Ant Shelter of Pupae, so-called ant-house

While the pupae are in the cocoon, they are incased in a shelter, often called an ant-house.

The pupa of a <em>Coleophora malivorella</em>

Apple Case-Bearer

The pupa of a Coleophora malivorella

"Army-worm (Leucania unipuncta), about natural size. a, male moth; b, abdomen of female; c, eye; d, pupa; e, caterpillar."-Whitney, 1902

Army Worm

"Army-worm (Leucania unipuncta), about natural size. a, male moth; b, abdomen of female; c, eye; d,…

"An egg, four larvae, and two pupae of the honey bee in their cells." &mdash;Davison, 1906

Bee Larva

"An egg, four larvae, and two pupae of the honey bee in their cells." —Davison, 1906

The pupa of the honey-bee.

Honey Bee

The pupa of the honey-bee.

The pupa of the honey-bee.

Honey Bee

The pupa of the honey-bee.

A carpet beetle in its pupal stage.

Carpet Beetle

A carpet beetle in its pupal stage.

"Carrion-beetle (Silpha inaequalis). a, larva; d, same; f, g, h, mandible, labium, and maxilla of larva; i, j, anal process and antenna of same; m, one of the lateral processes. b, pupa; e, same; l, anal process of same. c, beetle; k, anterior tarsus of same." -Whitney, 1911

Carrion Beetle

"Carrion-beetle (Silpha inaequalis). a, larva; d, same; f, g, h, mandible, labium, and maxilla of larva;…

Pupa of the common carpet beetle, a small grayish or black beetle belonging to the order Coleoptera.

Common Carpet Beetle Pupa

Pupa of the common carpet beetle, a small grayish or black beetle belonging to the order Coleoptera.

The pupa of Dytiscus marginalis, the Great Diving Beetle.

Great Diving Beetle

The pupa of Dytiscus marginalis, the Great Diving Beetle.

The ventral and dorsal view of the pupa of Erotylus boisduvali, a fungus beetle.

Fungus Beetle Pupa

The ventral and dorsal view of the pupa of Erotylus boisduvali, a fungus beetle.

The pupa of the Dytiscus genus.

Great Diving Beetle

The pupa of the Dytiscus genus.

"They are all of medium size, more or less oblong-oval in form, and mostly bronze-colored, rarely brown or black with a greenish tinge."-Whitney, 1902

Ground Beetle

"They are all of medium size, more or less oblong-oval in form, and mostly bronze-colored, rarely brown…

The pupa stage of the longhorn beetle (Saperda candida).

Longhorn Beetle Pupa

The pupa stage of the longhorn beetle (Saperda candida).

A pupa of the May beetle.

May Beetle

A pupa of the May beetle.

A pupa of the May beetle in cocoon.

May Beetle

A pupa of the May beetle in cocoon.

"Pine-bark beetle whose work has made pine lumber expensive; pupa." &mdash;Davison, 1906

Pine Beetle

"Pine-bark beetle whose work has made pine lumber expensive; pupa." —Davison, 1906

This illustration shows the destructive pine-bark beetle: a, adult beetle, enlarged; b, adult, natural size; c, pupa, enlarged; d, larva, enlarged; e, young larva, enlarged; f, egg, enlarged; g, larva, natural size.

Pine Beetle Stages

This illustration shows the destructive pine-bark beetle: a, adult beetle, enlarged; b, adult, natural…

Also known as crioceris asparagi. A-Beetle; B-Egg; C-Newly hatched larva; D-Full-grown larva; E-Pupa

The Life Cycle of the Asparagus Beetle

Also known as crioceris asparagi. A-Beetle; B-Egg; C-Newly hatched larva; D-Full-grown larva; E-Pupa

"The flatheaded borer, the pupa." &mdash; Goff, 1904

Borer Insect

"The flatheaded borer, the pupa." — Goff, 1904

"Peach tree borer, pupae." &mdash;Davison, 1906

Peach Tree Borer

"Peach tree borer, pupae." —Davison, 1906

"Peach tree borer, pupae." &mdash;Davison, 1906

Peach Tree Borer

"Peach tree borer, pupae." —Davison, 1906

"Peach tree borer, chip cocoon with extruded pupa skin." &mdash;Davison, 1906

Peach Tree Borer

"Peach tree borer, chip cocoon with extruded pupa skin." —Davison, 1906

The Hickory tree-borer is among many beetles whose larvae bore into trees, where they do great damage. This is the pupa.

Tree Borer

The Hickory tree-borer is among many beetles whose larvae bore into trees, where they do great damage.…

"Ox Botfly. a.-- larva, full grown, natural size; b,-- pupa; c.-- perfect insect. Botfly, Gadfly, and Warble-fly, names common to many insects of the family OEstridae, the genus OEstrus of Linnaeus." -Vaughan, 1906

Ox Botfly

"Ox Botfly. a.-- larva, full grown, natural size; b,-- pupa; c.-- perfect insect. Botfly, Gadfly, and…

There are three stages of a butterfly: caterpillar, pupa, and butterfly; respectively.

Butterfly

There are three stages of a butterfly: caterpillar, pupa, and butterfly; respectively.

The stages of a butterfly: the caterpillar, the pupa, and the adult butterfly.

Butterfly

The stages of a butterfly: the caterpillar, the pupa, and the adult butterfly.

This pupa, or chrysalis, is fastened to a little silken pad by the tail, but is also sustained by a silken band in front of the middle, so that it is said to be girthed.

Black Swallowtail Butterfly Larva

This pupa, or chrysalis, is fastened to a little silken pad by the tail, but is also sustained by a…

The cabbage butterfly is one of the easiest of the butterflies to capture and rear, (Colton, 1903) This is a pupa.

Cabbage Butterfly

The cabbage butterfly is one of the easiest of the butterflies to capture and rear, (Colton, 1903) This…

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.

Metamorphosis of the monarch butterfly, pupa

Monarch Butterfly

Metamorphosis of the monarch butterfly, pupa

"Butterfly, Grub or Caterpillar, and Pupa or Chrysalis" &mdash; Goodrich, 1859

Stages of Development of a Butterfly

"Butterfly, Grub or Caterpillar, and Pupa or Chrysalis" — Goodrich, 1859

The pupa or chrysalis of the butterfly.

Chrysalis

The pupa or chrysalis of the butterfly.

A family of homopterous hemipterous insects.

Cicada Larva

A family of homopterous hemipterous insects.

A family of homopterous hemipterous insects.

Cicada Larva

A family of homopterous hemipterous insects.

An illustration of a cockchafer pupa. The cockchafer (colloquially called may bug, billy witch, or spang beetle, particularly in East Anglia) is a European beetle of the genus Melolontha, in the family Scarabaeidae. Once abundant throughout Europe and a major pest in the periodical years of "mass flight", it had been nearly iradicated in the middle of the 20th century through extensive use of pesticides and has even been locally exterminated in many regions. However, since a change in pest control beginning in the 1980s, its numbers have started to grow again. As they don't tolerate pollution well, their presence is usually a marker of low pollution levels.

Cockchafer Pupa

An illustration of a cockchafer pupa. The cockchafer (colloquially called may bug, billy witch, or spang…

An illustration of a house cricket pupa. Acheta domesticus (house cricket) is a cricket native to Europe. Both sexes of this grey or brown cricket are fully winged but can't fly. Originally from the Middle East and North Africa the insect is found in permanently heated buildings such as bakeries. Its shrill warbling song is heard mainly at night.

House Cricket Pupa

An illustration of a house cricket pupa. Acheta domesticus (house cricket) is a cricket native to Europe.…

"House Cricket (Gryllus domesticus): a, eggs; b, young just hatched; c, full-grown larva; d, pupa; e, perfect insect." &mdash; Chambers' Encyclopedia, 1875

House Cricket

"House Cricket (Gryllus domesticus): a, eggs; b, young just hatched; c, full-grown larva; d, pupa; e,…

Currant-worm, pupa.

Currant Worm

Currant-worm, pupa.

An illustration of an earwig pupa. Earwigs is the common name given to the insect order Dermaptera characterized by membranous wings folded underneath short leathery forewings (hence the literal name of the order&mdash;"skin wings"). The abdomen extends well beyond the wings, and frequently, though not always, ends in a pair of forceps-like structures termed cerci. The order is relatively small among Insecta, with about 1,800 recorded species in 10 families. Earwigs are, however, quite common globally. There is no evidence that they transmit disease or otherwise harm humans or other animals, despite their nickname pincher bug.

Earwig Pupa

An illustration of an earwig pupa. Earwigs is the common name given to the insect order Dermaptera characterized…

"Common Firefly (Photinus pyralis). a, larva; b, pupa in its earthen cell; c, beetle. d, e, f, leg, under side of segment, and head of larva." -Whitney, 1911

Common Eastern Firefly

"Common Firefly (Photinus pyralis). a, larva; b, pupa in its earthen cell; c, beetle. d, e, f, leg,…

An illustration of the pupa of a common flea. After going through three larval stages they spin a silken cocoon. After another week or two the adult flea is fully developed and ready to emerge from the cocoon. They may however remain resting during this period until they receive a signal that a host is near - vibrations (including sound), heat and carbon dioxide are all stimuli indicating the probable presence of a host. Fleas are known to overwinter in the larval or pupal stages.

Flea Pupa

An illustration of the pupa of a common flea. After going through three larval stages they spin a silken…

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

Robber Fly Pupa

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

"Crane-fly (Tipula oleracea): a, eggs; b, larva; c, pupa case as left by the insect, sticking out of the eath; d, perfect insect." &mdash; 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 pupa of the horse fly.

Horse Fly

The pupa of the horse fly.

The enclosed puparium 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.

Sheep Bot Fly

The enclosed puparium of the Sheep Bot Fly (Oestrus ovis) is a fly in the Oestridae family of bot flies…

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

Buffalo Gnat Pupa

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

<em>Tremex columba</em>, female pupa.

Pigeon Horntail

Tremex columba, female pupa.

<em>Tremex columba</em>, male pupa.

Pigeon Horntail

Tremex columba, male pupa.

<em>Tremex columba</em>, female.

Pigeon Horntail

Tremex columba, female.

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; pupa." &mdash;Davison, 1906

Ladybird

"Ladybird beetle; pupa." —Davison, 1906

The pupa of the Threebanded Grape Leafhopper (Erythroneura tricincta) is an insect in the Cicadellidae family of hoppers.

Threebanded Grape Leafhopper Pupa

The pupa of the Threebanded Grape Leafhopper (Erythroneura tricincta) is an insect in the Cicadellidae…

"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."…