HEMIPTERA HETEROPTEHA. 



43 



§§ Transverse border of the neck complete. 



X Cuneus short-triangular, curvilinear, little longer 



than the breadlh of its base. 

 o Head thick. - 



oo Head slender, elongated. 



-+ Rostrum extending to the hind border of the 

 metapectus. - 

 h — t- Rostrum extending to the second or third ventral 



segment. - 



XX Cuneus rectilinear, almost twice as long as the 

 breadth of its base. 

 §§ Fore border of the prothorax with a broad rim. 

 X Callus of the front conspicuous, extending in a 



sharp angle of the front. 

 o Head thick. - 

 oo Head less thick, somewhat elongated. 

 -+ Rostrum extending to the second or to the third 

 ventral segment. - 



-n- Rostrum extending to the middle of the meta- 

 pectus. --_--- 

 X X Callus of the front passing with a curve into the 

 vertex, 

 o Third joint of the hind tarsi somewhat longer than 

 the second. - 

 oo Third joint of the hind tarsi somewhat shorter 



than the second. - 



ft Prothorax with no rim in front. 

 X Areolets of the wings without hooks. 

 § Head transverse. 

 X Callus of the front extending almost into a 

 quadrant. - 



X X Callus of the front compressed, more or less pro- 

 minent. 

 o Cheeks elevated into ridges along the eyes. 

 oo Cheeks not elevated into ridges along the eyes. 

 -+ Head remarkably straightened behind the eyes. 

 ++ Third joint of the hind tarsi longer than the 

 second. - 



+■*•++ Third joint of the hind tarsi shorter thad the 

 second. - 



Head not straightened behind the eyes. 

 Prothorax bell-shaped. 



Head not thick, compressed between the eyes. 

 Head thick. 



Prothorax short-bell-shaped. ... 

 Prothorax elongale-bell-shaped. 

 Prothorax transverse- or elougate-trapeziform. 

 Second joint of the antennae cylindrical, or slightly 

 clavate. 

 Rostrum extending to the hind border of the 



mesopectus. 

 = Second joint of the hind tarsi longer than the third 



++ 



© 



0© 



■M-++ 



ten 



Charagochilus. 



PoLYMERUS. 



Cyphodkma. 



Tylonotus. 



Lygus. 



pceciloscytus. 



Hadrodema. 

 Orthopb. 



Stiphrosoma. 

 Halticub. 



Cyllocoris. 

 Globiceps. 



Mecomma. 



Cyrtorhinus. 

 Aetorhinus. 



Pachylops. 



