Phthiraptera Lice; an order of wingless hemipterodean insects comprising two groups: Anoplura (sucking lice) and Mallophaga (chewing lice), often classified as distinct orders; lacking eyes and with antennae reduced.
wingless ectoparasites. There are two main kinds of lice (Order Phthiraptera); the biting lice and the sucking lice.