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Large flies with many-jointed, slender, thread-like antennae and scarcely shorter maxillary palpi.

Crane Fly

Large flies with many-jointed, slender, thread-like antennae and scarcely shorter maxillary palpi.

This insect derives its common name from the fact that it seems to prefer clustering in great numbers at the base of the horns of cattle, although it is really just as abundant on the flanks, pon the udder, and in other places where it cannot be readily reached by the animals.

Horn Fly

This insect derives its common name from the fact that it seems to prefer clustering in great numbers…

The horse-flies or <em>tabanidae</em>, comprise another set of troublesome creatures, of medium or large size. They have short, broad heads, enormous eyes, and short, though many jointed, feelers. The abdomen is oval, a little flattened, and the body convex and powerful. The mouth parts are well developed, consisting of a series of five sharped-pointed lancets so rigid that they readily pierce the skin and draw blood almost as soon as they touch.

Horse Fly

The horse-flies or tabanidae, comprise another set of troublesome creatures, of medium or large…

Piercing mouth structure of a "horse-fly": the sucking lip is omitted.

Mouth Structure of a Horse Fly

Piercing mouth structure of a "horse-fly": the sucking lip is omitted.

The larvae are elongated, somewhat flattened creatures, some living in the soil, some in water, and some in marshes, preying upon what ever comes in their way.

Horse Fly Larva

The larvae are elongated, somewhat flattened creatures, some living in the soil, some in water, and…

The pupa of the horse fly.

Horse Fly Pupa

The pupa of the horse fly.

Lantern-flies may be found on the under side of leaves of various plants, particularly grape, sucking the juices, preferably from the larger veins or ribs.

Lantern Fly

Lantern-flies may be found on the under side of leaves of various plants, particularly grape, sucking…

Lantern-flies may be found on the under side of leaves of various plants, particularly grape, sucking the juices, preferably from the larger veins or ribs.

Lantern Fly

Lantern-flies may be found on the under side of leaves of various plants, particularly grape, sucking…

The Olfersia species

Louse Fly

The Olfersia species

May-fly and its larva.

May Fly

May-fly and its larva.

A small blue fly, slender and somewhat flattened in appearance, with yellow or reddish legs.

Window Fly

A small blue fly, slender and somewhat flattened in appearance, with yellow or reddish legs.

A most singularly-formed insect; the front part of its head being much prolonged, and projecting upward like a thin curved horn.

Fulgora

A most singularly-formed insect; the front part of its head being much prolonged, and projecting upward…

As a rule, the antennae are straight, without break from base to tip; but occasionally they are <em>geniculate</em>, or elbowed; that is to say, there is one very long basal joint, the "scape," followed by a series of smaller segments se in at right angles to it.

Geniculate Antenna

As a rule, the antennae are straight, without break from base to tip; but occasionally they are geniculate,…

They are rather undersized, chunky flies, dark in color, with the thorax well developed and somewhat produced forward so as to partially conceal the small head from above.

Buffalo Gnat

They are rather undersized, chunky flies, dark in color, with the thorax well developed and somewhat…

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 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…

The larva of the Sciara tritici

Fungus Gnat

The larva of the Sciara tritici

The pupa of the Sciara tritici.

Fungus Gnat

The pupa of the Sciara tritici.

The pupa of the Sciara tritici from the side.

Fungus Gnat

The pupa of the Sciara tritici from the side.

The adult female of the Sciara tritici.

Fungus Gnat

The adult female 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…

A grasshopper disarticulated and separated into regions, with all the parts named; the segments of the abdomen are numbered and are not alike on the dorsal and ventral surface.

Grasshopper

A grasshopper disarticulated and separated into regions, with all the parts named; the segments of the…

The Grape Leaf Hopper with wings expanded

Grape Leaf Hopper

The Grape Leaf Hopper with wings expanded

Section through insect crust, showing layers of chitin at <em>c</em>, the cellular layer or hypodermis at <em>h</em>, and basal membrane at <em>b</em>.

Insect Crust

Section through insect crust, showing layers of chitin at c, the cellular layer or hypodermis…

A <em>lamellate</em> feeler has at its tip a series of elongate, flattened or leaf-like joints, usually applied close together to form a solid mass that conceals and protects the delicate sensory structure on the inner surface.

Lamellate Antenna

A lamellate feeler has at its tip a series of elongate, flattened or leaf-like joints, usually…

A tiny soft bodied, wingless insect that feeds on the mold in un-kept books.

Book Louse

A tiny soft bodied, wingless insect that feeds on the mold in un-kept books.

Female hop-louse, showing eggs through skin.

Hop Louse

Female hop-louse, showing eggs through skin.

Mouth parts of a plant-louse. -<em>a</em>, the jointed beak; <em>b</em>, the lancets, much enlarged; <em>c</em> and <em>d</em> illustrate the feeler and foot.

Mouth Parts of Plant Louse

Mouth parts of a plant-louse. -a, the jointed beak; b, the lancets, much enlarged;…

Ceraphron triticum, parasitic in wheat plant-louse

Wheat Louse

Ceraphron triticum, parasitic in wheat plant-louse

Trypeta pomonella. The parent of the apple-maggot.

Apple Maggot

Trypeta pomonella. The parent of the apple-maggot.

Mouth parts of a mandibulate insect: different types of mandibles at a <em>a</em>, <em>b</em>, <em>c</em>, <em>d</em>, <em>e</em>; <em>f</em>, the labrum-epipharynx; <em>g</em>, <em>h</em>, types of maxillae; the cardo at <em>c</em>; stipes, <em>st</em>; subgalea, <em>sg</em>; galea as marked; palpus bearer, <em>pfr</em>; palpus at <em>mxp</em>; lacinia at <em>lac</em>; and digitus at <em>dig</em>; <em>i</em>, the labium with sub-mentum, <em>sm</em>, mantum, <em>m</em>, ligula, <em>lig</em>, paraglossa, <em>par</em>, and palpi.

Mandibles

Mouth parts of a mandibulate insect: different types of mandibles at a a, b, c,…

Showing the legs and body from the side.

Mantispa

Showing the legs and body from the side.

Nymph ready to change

Molting of a Grasshopper

Nymph ready to change

The skin split along the back and the adult emerging.

Molting of a Grasshopper

The skin split along the back and the adult emerging.

The continuing of the process of the molting.

Molting of a Grasshopper

The continuing of the process of the molting.

The adult insect drying out.

Molting of a Grasshopper

The adult insect drying out.

An antenna is <em>moniliform</em>, or bead-like, when the joints are more or less spherical and set together in such a way as to resemble a series of beads on a string.

Moniliform Antenna

An antenna is moniliform, or bead-like, when the joints are more or less spherical and set…

Melitara prodenialis species; larva.

Moth

Melitara prodenialis species; larva.

The bee-moth of the Galleria melonella species; larva.

Bee Moth

The bee-moth of the Galleria melonella species; larva.

The bee-moth of the Galleria melonella species; cocoon.

Bee Moth

The bee-moth of the Galleria melonella species; cocoon.

The bee-moth of the Galleria melonella species; pupa.

Bee Moth

The bee-moth of the Galleria melonella species; pupa.

The bee-moth of the Galleria melonella species; moth.

Bee Moth

The bee-moth of the Galleria melonella species; moth.

The female gypsy moth or Ocneria dispar.

Gypsy Moth Female

The female gypsy moth or Ocneria dispar.

The male gypsy moth or Ocneria dispar

Gypsy Moth Male

The male gypsy moth or Ocneria dispar

The Female Leopard Moth

Leopard Moth Female

The Female Leopard Moth

The Leopard Moth caterpillar half grown

Leopard Moth Larva

The Leopard Moth caterpillar half grown

The Leopard Moth caterpillar half grown

Leopard Moth Larva

The Leopard Moth caterpillar half grown

The Male Leopard Moth

Leopard Moth Male

The Male Leopard Moth

A brown and yellow insect.

Pickle Moth

A brown and yellow insect.

The larva of a <em>Margaronia nitidalis</em> on a small cucumber which had been eaten into.

Pickle Moth Larva

The larva of a Margaronia nitidalis on a small cucumber which had been eaten into.

Adult white ermine moth, Spilosoma Virginica.

White Ermine Moth

Adult white ermine moth, Spilosoma Virginica.

Nervous system of a honeybee

Nerve System

Nervous system of a honeybee

Nervous system of a honeybee larva

Nerve System of Larva

Nervous system of a honeybee larva

These are large or very large creatures, black or honey-yellow in color, and the bodies are transversely flattened and squarly cut off at the posterior extremity.

Long-Tailed Ophion

These are large or very large creatures, black or honey-yellow in color, and the bodies are transversely…

The Orange Dog, caterpillar of Papilio creshontes, with osmateria, or scent organs, extended.

Orange Dog

The Orange Dog, caterpillar of Papilio creshontes, with osmateria, or scent organs, extended.

In this latter series the fore-wings are much more pointed than in the other, and the body is proportionately more robust

Pamphila Ethlius

In this latter series the fore-wings are much more pointed than in the other, and the body is proportionately…

A Panorpa or Scorpion fly.

Panorpa

A Panorpa or Scorpion fly.

Otiocerus coquebertii, a small insect of a somewhat elongated form and having a small projection in front, resembling the lantern of the true fulgora or lantern fly of Surinam, but on a very diminutive scale; it feeds on the wild grape, beech, and oak; it is 0.35 to 0.45 in length, and of a yellowish-white color, with a bright carmine red stripe running longitudinally along each side of its wing, and which stripe is usually forked at its hinder end.

Planthopper

Otiocerus coquebertii, a small insect of a somewhat elongated form and having a small projection in…

When the processes become very slender, almost hair-like, and exceedingly numerous, it is said to be <em>plumose</em>.

Plumose Antenna

When the processes become very slender, almost hair-like, and exceedingly numerous, it is said to be…

Salivary gland of the caterpillar of <em>Melittia</em> <em>ceto</em>, modified for silk spinning: mandible of the same.

Salivary Gland

Salivary gland of the caterpillar of Melittia ceto, modified for silk spinning: mandible…