HEMIPTEEA HETEROPTERA. 151 



-»— »■ Fove lobe with a small tubercle on each side. - simulans. 



§§ Fore femora beneath with distinct and sometimes 

 rather long spines; lore tibiae beneath very 

 minutely denticulated. 



X Fore lobe of the prothorax with a little spine or acute 

 tubercle on each side; spines of the prothorax 

 and of the scuiellum rather long. Spongy furrow 

 of the fore tibiae hardly one-third ol their length, 

 that of the middle tibiae much shorter. eburneus, Serv., nigro- 

 spinosus, obscuricornis, rufescens, tricolor. 

 X X Fore lobe of the protborax with no spine or tubercle 

 on each side, 

 o Spines of the protborax short. Spine of the scutellum 

 moderately long, slightly inclined backward. 

 Spongy furrow at the fore tibiae hardly one-third 

 of their length. - flavofasciatus. 



oo Spines of the prothorax long. 



-+ Spongy furrow of the fore tibiae more than one-third 



of their length. ----- pyrrhomelas. 

 -+-*■ Spongy furrow of the fore tibiae about one-sixth or 



hardly more than one-eighth of their length. - mundus, 



Amazouus. 



** Fore lobe of the prothorax with four small tubercles, 

 those on each side sometimes almost obsolete. 

 Side angles of the hind lobe rectangular or 

 slightly acute, with no spine or tooth. Spine 

 of the scutellum short, almost erect, or slightly 

 inclined backward. Fore femora beueath very 

 minutely spinulose. Spongy furrow of the fore 

 tibiae rather long, 

 f Scutellum black. - stillatipennis, affinis. 



ff Scutellum reddish. - Scutellaria, tristillalus. 



b. Fore lobe of the prothorax with four small tubercles, 

 the side pair very minute ; side angles of the hind 

 lobe unarmed, rounded. Scutellum attenuated, 

 into a slightly hindward-reflexed spine. Fore 

 femora spinulose beneath. ... bicolor. 



B. Kidge elevated into two compressed slightly acute 

 tubercles. Spongy furrow ol the fore tibia; small. 

 Leg> rather short. Third joint of the hind tarsi 

 almost longer than the first and second joints 

 together. 



a. Head elongated. Ante-ocular part of the head and 



first joint of the rostrum almost equally long: 

 Fore lobe of the prothorax acutely quadiituber- 

 culate; side angles ol the hind lobe acute, some- 

 what prominent. Apical spine of the scuiellum 

 extended backward, hardly reflexed. Fore femora 

 distinctly thickened. Spongy furrow of the fore 

 tibiae oval, small. ... rubropictus. 



b. Head oval, rather short. First joint of the rostrum 



a little longer than the ante-ocular part of the 



