44 POPULAR ENTOMOLOGY. 



SECTION II. 



AuROCOEiSA. — Those breathing the air. 



1. AcanthidcB. — Legs long and slender; antennse half the 



length of the body; eyes large; rostrum long and 

 slender; body oval and depressed; tarsi three-jointed. 

 Locality, the sea-shore and banks of rivers. 



2. Hydrometrida. — Legs variable in different genera, but 



not raptorial ; tarsi two-jointed ; antennse long, slender, 

 four-jointed ; rostrum of moderate length ; head as 

 broad as the thorax ; body long and narrow. Locality, 

 the surface of running or standing water. 



3. Cimicid(E. — Legs moderately long and slender; tarsi 



three-jointed; antennse four-jointed; rostrum long; 

 wings reduced to a pair of short scale-like pieces; 

 body more or less round. 



4. Tingida. — Pore legs sometimes raptorial; tarsi often 



only two-jointed; antennse filiform; rostrum very short; 

 body broad and depressed. 



5. Capsidce. — Legs long and slender; tarsi three-jointed ; 



antennse long, second joint often thick at the tip, and 

 the terminal ones very slender ; rostrum long and 

 four-jointed ; the crustaceous part of the elytra termi- 



