Plant-Lice, Scale Insects, True Bugs, Etc. 



Table of Suborders 



Beak jointed, hard and horny i 



Beak unjointed, fleshy 2 



1 — Wings when present of the same thickness throughout and 



held usually in a sloping position at the sides of the 



body; beak inserted at the hinder part of the head 



Suborder Homopiera 



Forewings thickened at base, with thinner extremities which 



overlap; beak inserted on the front part of the head 



Suborder Hcteroptera 



2 — Wingless species, parasitic upon man and animals (the true 

 lice) Suborder Anoplura 



2S7 



