SUBFAMILY I. — PENTATOMIN^. 157 



side margins usually entire ; scutellum strongly tapering, its 

 apex narrower than and not reaching the outer apical angle 

 of the corium ; osteolar opening with either a distinct auricle 

 or canal. Nine of the 25 genera of the tribe belong in this 

 group. 



KEY TO EASTERN GEXERA OF SUBTRIBE III OF PEXTATOMIXI. 



a. Cheeks not surpassing tylus, or, if slightly so, not contiguous in 

 front of it. 

 b. Ventral spine not reaching middle coxae. 

 c. First joint of antennae passing apex of head, second about half 

 the length of third; color black and red or black and violet. 



XVII. Vulsirea, p. 158. 

 cc. First joint of antenna? not passing head, second usually more than 

 half the length of third; color not as above. 

 d. Larger, length 14 or more mm.; second antennal more than half 

 the length of fifth ; color usually clear green. 

 e. Spine of second ventral very short and obtuse; osteolar canal 

 short, subtruncate, not reaching middle of its supporting 

 plate; hind margin of genital plate of male with a broad and 

 very deep U-shaped emargination. XVIII. Nezara, p. 158. 

 ee. Spine of second ventral distinct; osteolar canal long, tapering, 

 much surpassing middle of its supporting plate; hind margin 

 of male genital plate shallowly emarginate or subtruncate. 



XIX. ACROSTERNUM, p. 160. 



del. Smaller, length not over 11 mm.; second antennal joint less than 

 half the length of fifth; color olivaceous green or darker; ven- 

 tral spine short, tuberculate. XX. Banasa, p. 163. 

 bb. Ventral spine reaching or slightly surpassing middle coxa?; spiracles 

 large, black. XXI. Piezodorus, p. 169. 

 aa. Cheeks surpassing tylus. 



/. Tips of cheeks acute, not approaching or contiguous; humeri end- 

 ing in a strong upward and outward projecting spine; mesoster- 

 num with a prominent acute median carina. 



XXII. Arvelius, p. 171. 



//. Tips of cheeks obtuse, approaching or contiguous in front of tylus ; 

 humeri not spined ; mesosternum not acutely carinate. 

 g. Side margins of pronotum with filamentous teeth ; body hairy. 



XXIII. Neopharnus, p. 172. 



gg. Side margins of pronotum without filamentous teeth; body 



glabrous. 



h. Side margins of pronotum not crenulate; form short, broadly 



oval; osteolar sulcus elongate, tapering into a narrow ridge; 



length less than 9 mm. XXIV. Dendrocoris, p. 173. 



hh. Side margins of pronotum crenulate; form elongate-oval; osteolar 



canal short, its tip obtuse; length 11 or more mm. 



XXV. Brepholoxa, p. 175. 



