A minute, two-winged fly, furnished with long anal filaments.

Cottony Maple Scale

A minute, two-winged fly, furnished with long anal filaments.

One element in eye of roach

Sensory Organs of Insects

One element in eye of roach

Section of compound eye.

Sensory Organs of Insects

Section of compound eye.

Organs of smell in May-beetle

Sensory Organs of Insects

Organs of smell in May-beetle

Sense organs in abdominal appendages.

Sensory Organs of Insects

Sense organs in abdominal appendages.

Ear on foreleg of locust

Sensory Organs of Insects

Ear on foreleg of locust

Ear found on the basal segment of grasshopper abdomen.

Sensory Organs of Insects

Ear found on the basal segment of grasshopper abdomen.

A <em>serrate</em> or saw toothed antenna has the joints more or less triangular in shape and so fitted the one margin resembles the toothed edge of a saw.

Serrate Antenna

A serrate or saw toothed antenna has the joints more or less triangular in shape and so fitted…

Setaceous.

Setaceous Antenna

Setaceous.

Ovarian tubes of one side, in <em>Polistes</em>, showing eggs in all stages of development, with nutritive cells, <em>nm</em>, between; <em>rs</em>, seminal receptacle; <em>ov</em>, oviduct; <em>vag</em>, vagina

Sexual Organ of Insects

Ovarian tubes of one side, in Polistes, showing eggs in all stages of development, with nutritive…

Male organs of May-beetle. One side only beyond the ductus ejaculatoris, <em>duct</em>. <em>ejac</em>. ; <em>glm</em>., mucus glands; <em>ves</em>.<em>sem</em>., seminal vesicles; <em>vas</em>. <em>def</em>., vasa deferentia

Sexual Organ of Insects

Male organs of May-beetle. One side only beyond the ductus ejaculatoris, duct. ejac.…

A small, wingless insect. Its common name derives from the animals silver-gray color

Silverfish

A small, wingless insect. Its common name derives from the animals silver-gray color

<em>Pectinated</em> or comb-toothed type, where the joints are furnished laterally with processes of variable length.

Singly Pectinate Antenna

Pectinated or comb-toothed type, where the joints are furnished laterally with processes of…

The larva of a spittle insect

Spittlebug

The larva of a spittle insect

The adult Spittle Insect

Spittlebug

The adult Spittle Insect

A small, wingless insect. Its common name derives from the animals silver-gray color.

Springtail

A small, wingless insect. Its common name derives from the animals silver-gray color.

The stem-mother that starts the transformation.

Stem Mother

The stem-mother that starts the transformation.

The larva of a termite.

Termite

The larva of a termite.

A winged male termite.

Termite

A winged male termite.

A worker termite.

Termite

A worker termite.

A soldier termite.

Termite

A soldier termite.

A female termite.

Termite

A female termite.

The pupa of a termite.

Termite

The pupa of a termite.

Ideal section through an insect. -<em>a</em>, alimentary canal; <em>h</em>, heart; <em>n</em>, nerve-cord; <em>s</em>, stigmata; <em>t</em>, tracheal tubes; <em>l</em>, legs; <em>w</em>, wings.

Transverse Thorax

Ideal section through an insect. -a, alimentary canal; h, heart; n, nerve-cord;…

It is common all through the United States, from Missouri northwards into Canada, and is sometimes the cause of considerable damage in orchards, particularly to young trees and nursery stock.

Buffalo Treehopper

It is common all through the United States, from Missouri northwards into Canada, and is sometimes the…

Head of Wasp to show regions: <em>a</em>, compound eyes; <em>b</em>, clypeus; <em>c</em>, labrum; <em>d</em>, mandibles; <em>e</em>, ocelli; <em>f</em>, place where antennae are inserted.

Head of Wasp

Head of Wasp to show regions: a, compound eyes; b, clypeus; c, labrum; d,…

<em>Vespa maculata</em>

White-faced Wasp

Vespa maculata

The nut weevils, are of quite large size, clay-yellow in color, and with an exceedingly long and slender, black beak or snout.

Chestnut Weevil

The nut weevils, are of quite large size, clay-yellow in color, and with an exceedingly long and slender,…

The nut weevils, are of quite large size, clay-yellow in color, and with an exceedingly long and slender, black beak or snout.

Chestnut Weevil

The nut weevils, are of quite large size, clay-yellow in color, and with an exceedingly long and slender,…

The nut weevils, are of quite large size, clay-yellow in color, and with an exceedingly long and slender, black beak or snout.

Chestnut Weevil

The nut weevils, are of quite large size, clay-yellow in color, and with an exceedingly long and slender,…

It's a small, blackish beetle, with gray pubescence, when the buds are developing, and lays an egg in each, afterward puncturing the flower-stalk below the bud so as to check development.

Strawberry Weevil

It's a small, blackish beetle, with gray pubescence, when the buds are developing, and lays an egg in…