SUBFAMILY III. LOCUSTIXJE. 373 



zona; teginina. oval or obovate, rarely over two-thirds the length 

 of pronotum, their upper iuuer margins distinctly separated in 

 both sexes, dorsal and anal fields not defined, tips broadly round- 

 ed ; hind femora slender, slightly surpassing tip of abdomen, male, 

 reaching tip or base of ovipositor, female; furcula and cerci vari- 

 able, according to species; subgenital plate rather broad, feebly 

 narrowed above, rarely strongly tuberculate. 



Six species and one variety comprise the group, all represented 

 in our territory ; five of them being known only from south of the 

 Ohio River. They inhabit, for the most part, dry hillside thickets 

 and wooded mountain slopes. 



KEY TO SPECIES OF THE OBOVATIPENNIS GROUP. 



a. Subgenital plate of male not strongly projected upward and backward 

 into a prominent tubercle; vertex but moderately projecting in 

 front of eyes. 



b. Sides of abdomen without distinct fuscous stripes or blotches for 

 two-thirds or more its length; tips of male cerci not obliquely 

 excised with lower angle pointed and decurved. 

 c. Hind margin of metazona without a trace of median notch; 



furcula cylindrical, tapering. 



d. Subgenital plate of male without a subapical tubercle; cerci 



of male truncate at tip (PL III, d.) 165. OBOVATIPENNIS. 



dd. Subgenital plate of male with a distinct but feeble subapical 



tubercle; tips of male cerci broadly rounded. 166. TEPIDUS. 



cc. Hind margin of metazona with a minute but distinct median 



notch; cerci of male obliquely rounded at tip; furcula very 



broad at base, abruptly narrowed and more or less angled or 



bifid at middle. (PI. Ill, f.) 167. MORSEL 



bb. Sides of abdomen with a distinct and sharply defined fuscous 



stripe or fuscous blotches, sometimes wanting in female; tips 



of male cerci usually obliquely excised with lower angle pointed 



and decurved. 



e. Dark stripe of lateral lobes narrow and sharply defined from 

 the pale ventral portion in both sexes; prosternal spine coni- 

 cal, acutely pointed; tips of male cerci with pronounced lower 

 angle (Fig. 129, b. ) 



f. Furcula short, flattened, distant, parallel finger-like projec- 

 tions about as long as the last dorsal segment. 



168. TRIBULUS. 



ff. Furcula much wider and longer, feebly tapering, flattened 

 from enlarged bases, their length one-third that of supra- 

 anal plate. 16Sa. TRIBUI.OIDES. 

 ee. Dark stripe of lateral lobes broader, and in the female feebly 

 defined, with lower portion more or less infuscated; proster- 

 nal spine cylindro-conic, bluntly pointed; tips of cerci with 

 lower angle blunt (Fig. 129, c.) 169. DEVIUS. 

 art. Subgenital plate of male strongly projected upward and backward 



