132 ZOOLOGICAL EXERCISES. 
Section HETEROPTERA. 
ANALYSIS OF THE FAMILIES. 
A. Posterior legs like the others ; antennze exposed. 
a. Scutellum reaching the membranous part 
of the elytra. 
* Leos unarmed. 
+ Abdomen not spinose. 
1 Rostrum thick ; basal joint 
notin agroove. Asopide. 
2 Rostrum slender ; basal joint 
In a groove. 
Head fiat, more or less 
foliaceous , Scrocorida. 
Head not foliaceous Pentatomide. 
++ Abdomen spinose at the 
base. ‘ Acanthosomatide. 
** Legs armed with spines. Cydide. 
b Scutellum not reaching the membranous 
part of the elytra. 
* Rostrum not free the whele length ; 
antenne shorter than the body. 
+ Ocelli present. 
1 Kody flat ; rostrumina groove <Aradide. 
2 Body narrow; rostrum not 
in a groove. 
+ Antennze clubbed ; inserted 
on upper side of head Berytide. 
tt Antenne setaceous, inserted 
on lower side of head. 
Membrane of elytra with a 
cross vein, Lygerde, 
