Sucking lice have specialized sucking mouthparts while chewing lice have chewing mouthparts. They have four membranous wings which are usually gray or pale brown. The front wings are elongate and narrow and the hind wings are slightly shorter. At rest the wings are held flat over abdomen. The antennae are long with many segments.
Stoneflies have long cerci projecting from the end of the abdomen.
They have chewing mouthparts. Fleas Fleas are small, wingless insects. They are shiny and dark brown or black. The abdomen is laterally flattened and has many spines and bristles. Fleas have long legs that are modified for jumping long distances.