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"They are the miners of the vegetable world. The thistle often nourishes them."

Anthomyia Pluvialis

"They are the miners of the vegetable world. The thistle often nourishes them."

"This species is common over the whole of Europe, and lives at the expense of caterpillars and other insects, of which it sucks the blood with the greatest voracity."

Asilus Crabroniformis

"This species is common over the whole of Europe, and lives at the expense of caterpillars and other…

"By catching one of these flies, and pressing the thorax between the finger and thumb, it is forced to put out its tongue."

Blue-Bottle Fly (Calliphora Vomitoria)

"By catching one of these flies, and pressing the thorax between the finger and thumb, it is forced…

"This trunk, or tongue, may be looked upon as the mouth of the insect."

Retractile Proboscis of Blue-Bottle Fly

"This trunk, or tongue, may be looked upon as the mouth of the insect."

"The Bombylidae may be recognized by the elegant fur which covers their bodies."

Bombylius Major

"The Bombylidae may be recognized by the elegant fur which covers their bodies."

Representation of the fly leaving the cocoon.

Imago of Bot-fly Emerging

Representation of the fly leaving the cocoon.

"The instrument with which the female is supplied for piercing the thick skin of the ox."

Ovipositor of the Bot-Fly (Estrus Bovis)

"The instrument with which the female is supplied for piercing the thick skin of the ox."

"Chrysops Caecutiens torment horses and cattle very much by biting them around the eyes."

Chrysops Caecutiens

"Chrysops Caecutiens torment horses and cattle very much by biting them around the eyes."

Conops "are to be found on flowers, of which they suck the honeyed juice."

Conops

Conops "are to be found on flowers, of which they suck the honeyed juice."

"A little fly about half the size of a house-fly. This insect lives chiefly upon the fruit of the olive-tree."

Dacus Oleae

"A little fly about half the size of a house-fly. This insect lives chiefly upon the fruit of the olive-tree."

"They pass fifteen or sixteen days in boring a gallery in the pulp of the olive, at first vertically, untiil they reach the stone, then on one side, and along the side of the stone."

Larvae of Dacus Oleae

"They pass fifteen or sixteen days in boring a gallery in the pulp of the olive, at first vertically,…

"A little fly about half the size of a house-fly. This insect lives chiefly upon the fruit of the olive-tree."

Olives attacked by Dacus Oleae

"A little fly about half the size of a house-fly. This insect lives chiefly upon the fruit of the olive-tree."

"Sometimes these insects destroy grass; they often injure the harvest."

Daddy Long Legs (Tipula Oleracea)

"Sometimes these insects destroy grass; they often injure the harvest."

"They derive nourishment from flowers, deposit their eggs on caterpillars, and the young larvae on hatching penetrate their bodies, and feed on them."

Echinomyia Grossa

"They derive nourishment from flowers, deposit their eggs on caterpillars, and the young larvae on hatching…

"The eggs are white and conical. They adhere to the horse's hair."

Eggs of Gadfly, Estrus (Gasterophilus) Equi

"The eggs are white and conical. They adhere to the horse's hair."

Larvae of Estrus (Gasterophilus) Equi. Representation of "the state of a horse's stomach attacked by the gadfly larvae."

Gadfly Larvae in a Portion of the Stomach of the Horse

Larvae of Estrus (Gasterophilus) Equi. Representation of "the state of a horse's stomach attacked by…

Gnats are a member of the <em>Culicidae</em> family. "They present a charming appearance when seen through a microscope."

The Gnat (Culex Pipiens)

Gnats are a member of the Culicidae family. "They present a charming appearance when seen through…

Gnats are a member of the <em>Culicidae</em> family. "They present a charming appearance when seen through a microscope."

The Gnat (Culex Pipiens)

Gnats are a member of the Culicidae family. "They present a charming appearance when seen through…

"The gnat's sting is a sort of a sword in miniature. These have their points reversed, and are serrated on the convex side of the bend."

Lancets of the Gnat

"The gnat's sting is a sort of a sword in miniature. These have their points reversed, and are serrated…

"Many have observed in stagnant water, a number of worm-like bodies. These are gnats in the larvae period."

Larva of the Gnat

"Many have observed in stagnant water, a number of worm-like bodies. These are gnats in the larvae period."

"The antennae of the male have a fine feathery appearance."

Magnified Antennae of Gnat

"The antennae of the male have a fine feathery appearance."

"The number of gnats which come into existence in the course of a year is marvelous."

Magnified Eggs of the Gnat

"The number of gnats which come into existence in the course of a year is marvelous."

"The head of the gnat with its two eyes, its antennae and trunk. Their eyes, covered with network, are so large that they cover nearly the whole head."

Magnified Head of Gnat

"The head of the gnat with its two eyes, its antennae and trunk. Their eyes, covered with network, are…

"That which is generally seen is only the case containing the instruments which are intended to pierce our skin and suck our blood."

Magnified Trunk of Gnat

"That which is generally seen is only the case containing the instruments which are intended to pierce…

In the pupa state, there is no digestive system, but it does have respiration organs.

Pupa of the Gnat

In the pupa state, there is no digestive system, but it does have respiration organs.

Illustration of the different stages of a gnats life.

Gnats Emerging

Illustration of the different stages of a gnats life.

"The larvae of these insects commit depredations for which gourmands will never forgive them, destroying, as they do, their mushroom."

A Species of Helomyza

"The larvae of these insects commit depredations for which gourmands will never forgive them, destroying,…

The tail of these worms will grow as the depth of water is increased to accommodate breathing.

Larvae of Helophilus

The tail of these worms will grow as the depth of water is increased to accommodate breathing.

"In England they are known as rat-tailed maggots, and their habits are aquatic."

Species of Helophilus

"In England they are known as rat-tailed maggots, and their habits are aquatic."

"During the months of July and August, the Estrus frequents pastures, and deposits its eggs on the shoulders, knees, etc., of horses."

Female Horse-Fly, Estrus (Gasterophilus) Equi

"During the months of July and August, the Estrus frequents pastures, and deposits its eggs on the shoulders,…

"During the months of July and August, the Estrus frequents pastures, and deposits its eggs on the shoulders, knees, etc., of horses."

Male Horse-Fly, Estrus (Gasterophilus) Equi

"During the months of July and August, the Estrus frequents pastures, and deposits its eggs on the shoulders,…

"Ashy color, with the face black, the sides of the head yellow, and the forehead yellow with black stripes."

House-Fly (Musca Domestica)

"Ashy color, with the face black, the sides of the head yellow, and the forehead yellow with black stripes."

"A specimen of the golden fly; it is rather more than one third of an inch in length."

Lucilia Hominivorax

"A specimen of the golden fly; it is rather more than one third of an inch in length."

"In order that the may pierce the skin, the fly is provided with a very small lancet, which has a very fine point, and is of light color."

Lancet of the Meat-Fly

"In order that the may pierce the skin, the fly is provided with a very small lancet, which has a very…

"The trunk appears to be composed of two parts, joined, and forming a more or less obtuse angle."

Trunk of the Meat-Fly

"The trunk appears to be composed of two parts, joined, and forming a more or less obtuse angle."

"The Tabanus Autumnalis is a common species, eight or nine lines in length, or a blackish color."

Tabanus Autumnalis

"The Tabanus Autumnalis is a common species, eight or nine lines in length, or a blackish color."

"It is not dangerous to man, but its sting kills the ox, the horse, the sheep and the dog, and renders the countries of Central Africa uninhabitable for those animals."

The Tsetse-Fly (Glossina Morsitans)

"It is not dangerous to man, but its sting kills the ox, the horse, the sheep and the dog, and renders…

"It is not dangerous to man, but its sting kills the ox, the horse, the sheep and the dog, and renders the countries of Central Africa uninhabitable for those animals."

Head of Tsetse-Fly (Glossina Morsitans)

"It is not dangerous to man, but its sting kills the ox, the horse, the sheep and the dog, and renders…

"The larva makes a small tunnel in the sand, having a conical mouth, where it waits, like the spider, immovable. As soon as an insect falls into the hole, it raises its head, and squeezing its prey in the folds of its body, devours it."

Vermilea de Geeri

"The larva makes a small tunnel in the sand, having a conical mouth, where it waits, like the spider,…

Because they resemble the humblebee, they introduce their eggs into humblebee nests. When the larvae hatch, they devour the larvae of their hosts.

A Species of Volucella

Because they resemble the humblebee, they introduce their eggs into humblebee nests. When the larvae…