Overview

The only species present is the human crab louse Pthirus pubis .

Description

Head relatively small; mouth-parts developed into an unjointed more or less pointed beak, or rounded anteriorly, without mandibles. Head with distinct eyes or ocular points behind antennae. Head with eyes having distinct lens but without ocular points; on humans. Abdomen compact, about as long as basal width, with hairy lateral tubercules; fore legs smaller and more slender than mid and hind legs.