"An order of the class Arachinida, includes those insects, as the mites, ticks, itch-insects, etc., which are without a definite line of demarktationbetween the unsegmented abdomen appearing united in one."-Whitney, 1902

Acarida

"An order of the class Arachinida, includes those insects, as the mites, ticks, itch-insects, etc.,…

The itch mite (Sarcoptes) is a genus of skin parasites, and part of the larger family of mites collectively known as "scab mites". Adult scabies mites are spherical, eyeless mites with four pairs of legs. They are recognizable by their oval, ventrally flattened and dorsally convex tortoise-like body and multiple cuticular spines. Females are 0.30 to .45 mm long and 0.25 to 0.35 mm wide, and males are just over half that size.

Itch Mite

The itch mite (Sarcoptes) is a genus of skin parasites, and part of the larger family of mites collectively…

The mite producing sheep scab.

Mite

The mite producing sheep scab.

The harvest mite or chigger (Leptus autumnalis) is a mite that live in forests and grasslands.

Harvest Mite

The harvest mite or chigger (Leptus autumnalis) is a mite that live in forests and grasslands.

A French Phylloxera, slightly distorted.

Phylloxera

A French Phylloxera, slightly distorted.

French Phylloxera, distorted in mounting.

Phylloxera

French Phylloxera, distorted in mounting.

American Phylloxera.

Phylloxera

American Phylloxera.

American Phylloxera.

Phylloxera

American Phylloxera.