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 Homoptera 



Forewings thickened at base, with thinner extremities which 



overlap; beak inserted on the front part of the head 



Suborder Heteroptera 



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

 lice) Suborder Anoplura 



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