BOOPEDON. 95 



b l . Hind femora distinctly banded, both internally and externally. 

 Hind tibiae reddish, 14-15-spined in the outer row, the inner 

 apical spurs very unequal. 

 c 1 . ? sometimes uniformly fuliginous, but usually yellow varied 



with brown. [Plains east of the Rocky Mountains.] . . [1. flavofasciatum, Thom.] 

 c*. ? dark, shining, almost uniform ferruginous ; lower angles 

 of face, sides of labrum, and tips of tegmina black. [Same 



locality as preceding.] [2. nubilum, Say.] 



b 1 . Hind femora usually uniformly fuscous or deep fuliginous. 

 Hind tibiae infuscated, 10-11-spined in the outer row, and 

 with the inner apical spurs not very unequal. [Arizona and 



probably the adjoining portions of Mexico.] 3. fuscum, sp. n. 



A*. Pronotum with the last transverse sulcus situated distinctly 



behind the middle. Head variable in shape, but generally more 



angulate. Tegmina greatly abbreviated, and with their apices 



usually rounded or but slightly pointed in both sexes. £ nearly 



or quite as light-coloured as the $ . 



b l . Hind femora long and slender. Hind tibiae with more numerous 



(13-15) spines in the outer row. Sides and posterior edges 



of the pronotum light-coloured. 



c 1 . General colour brownish, varied with black above, lighter 



beneath. Hind femora obscurely banded. Hind tibiae 



dull-coloured, with 13 spines in the outer row. [Prairies 



of Eastern Nebraska and Kansas.] [4. savannarum, sp. n.] 



c*. General colour testaceous, varied with orange, fuscous, and 

 black. Hind femora conspicuously banded. Hind tibiae 

 red on the apical half, with 15 spines in the outer row. 



Abdomen of S orange-red above. [Arkansas and Texas.] . [5. auriventris, McNeill.] 

 b*. Hind femora short and comparatively robust. Hind tibiae with 

 fewer (10-11) spines in the outer row. Sides of the pronotum 

 with their lower edge bordered with testaceous or light colour. 

 c 1 . Rather large and robust. General colour very dark fuscous 

 or fuliginous. Face, the lower lateral edge of the pronotum 

 narrowly, and the lower edge of the hind femora, light- 

 coloured. [Tepic, Mexico.] 6. diabolicum, sp. n. 



c\ Smaller. General colour testaceous. Top of head and disc 

 of pronotum dark fuscous, the sides of the latter above, and 

 the hind femora with the knees and a broad preapical band, 

 black. [Western Mexico.] 7. ftaviventris, sp. n. 



[l. Boopedon flavofasciatum, Thomas. 



Boopedon flavofasciatum, Thomas, Proc. Acad. Nat. Sci. Phil. 1870, p. 84 1 ; Ann. Rep. U.S. Geol. 

 Surv. Terr. ii. p. 273 (1871) 2 ; Glover, Illustr. N. Amer. Ins., Orthopt. t. 8. fig. 10 (1872) 3 ; 



