10 EN TOMOLOGY 
g. Hemiptera. — Metamorphosis direct (excepting male 
Coccide). Antenne usually few-jointed. Mouth parts suc- 
torial. Prothorax usually large. Wings usually present, 
except in the parasitic forms. Eighteen thousand _ species. 
Three suberders : 
Suborder Heteroptera.—W ings four, folded flat; front 
wings thickened basally, membranous apically (hemelytra), 
Benacus griseus. Slightly reduced. 
overlapping obliquely; hind wings membranous. Head not 
deflexed. Example, Benacus (Fig. 22). About twelve thou- 
sand species. 
Suborder Homoptera.—\V ings four, sloping roof-like, sim- 
ilar and membranous or front pair somewhat coriaceous 
throughout. Head deflexed. Example, Cicada (Fig. 206). 
Six thousand species. 
Suborder Parasita. — Wingless. [Eyes simple or none: 
Thoracic segments intimately united; tarsus with a single 
claw. Integument thin. Parasites upon mammals. Exam- 
ple, Pediculus (lig. 23). Some fifty species are known. 
10. Neuroptera.— Metamorphosis indirect. Antenne con- 
