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.
Their eyes and antennae are small and they have sucking mouthparts. Bristletails Bristletails are small to medium sized insects, elongate and flattened with small scales covering the body. They are wingless. They have very long antennae and three tail-like appendages at the posterior end of the abdomen. Bristletails have chewing mouthparts.