HEMIPTERA HETEROPTERA. 



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Transverse border of the neck complete. 



Cuneus short-trian<riilar, curvilinear, little longer 



tban the breaclih otits base. 



Head thick. . - - - . Chabaoochilus. 



Head slender, elonj^ated. 

 Rostrum extending to the hind border of the 



metapectus. - - _ - . Polvmerus. 



Rostrum extending to the second or third ventral 



segment. . . . . _ Cyphodema. 



Cuneus rectilinear, almost twice as long as the 



breadth of its base. 



Fore border of the prolhorax with a broad rim. 

 Callus of the front conspicuous, extending in a 



sharp angle of the front. 



Head thick. - - . . . Tylonotus. 



Head less thick, somewhat elongated. 

 Rostrum extending to the second or to the third 



ventral segment. - . - - Lvaus. 



Rostrum extending to the middle of the meta- 

 pectus. --.--- PCECILOSCYTUS. 

 Callus of the front passing with a curve into the 



vertex. 

 Third joint of the hind tarsi somewhat longer than 



the second, - - - . . Hadrodema. 



Third joint of the hind tarsi somewhat shorter 



than the second. .... Orthopb. 



Prothorax with no rim in front. 

 Areolets of the wings without hooks. 

 Head transverse. 

 Callus of the front extending almost into a 



quadrant. ..... Stiphrosoma. 



Callus of the front compressed, more or less pro- 

 minent. 



Cheeks elevated into ridges along the eyes. - Halticub. 



Cheeks not elevated into ridges along the eyes. 

 Head remarkably straightened behind the eyes. 

 Third joint of the hind tarsi longer than the 



second. ..... Cyllocoris. 



Third joint of the hind tarsi shorter thad the 



second. ..... Globiceps. 



Head not straightened behind the eyes. 



Prothorax bell-shaped. 



Head not thick, compressed between the eyes. - Mecomma. 



Head thick. 



Prothorax short-bell-shaped. ... Cyrtorhincs. 



Prothorax elongate-bell-shaped. - - Aetorhinus. 



Prothorax transverse- or elougate-trapeziform. 

 Second joint of the antennas cylindrical, or slightly 



clavate. 

 Rostrum extending to the hind border of the 



mesopectus. 

 Second joint of the hind tarsi longer than the third. Pachylops. 



