ACRIDUXE. 561 



each side; fore border and sides slightly rounded; hind border much 

 elongated, but not angular. Prosternal spine stout, convex in front, 

 extending somewhat beyond the fore border of the mesosternum. Spines 

 of the hind tibiae with black tips, especially long on the inner side. Fore 

 wings cinereous, with markings formed by black or brown veins ; a row of 

 subcostal dots, some of which are elongated ; two spots in the disk, the first 

 near the base ; three exterior oblique bands ; first much abbreviated ; 

 second less abbreviated ; third composed of three patches. Hind wings 

 pellucid ; veins black, pale towards the base. Length of the body 24 lines ; 

 expansion of the fore wings 54 lines. 



The hind part of the prothorax is less widened and the spines of the 

 hind tibia) are longer than those of C. fascifera, which this species most 

 resembles. 



a. East Africa. Presented by Earl Russell. 



24. CYRTACANTHACRIS FLAVESCENS. 



Mas. Pallide flava ; vertex lineolis duabus ferrugineis ; prothorax fulvo 

 palli(tb late quadriviltatus ; alee diaphance, pallido venosce ; al<e 

 antiae basi pullide flavce. 



Male. Pale yellow. Head smooth ; vertex with two short tawny 

 lines which converge from the hind border ; fore part in structure like that 

 of C. concisa ; keels of the front strongly marked, the outer pair diverging 

 more than the inner pair. Eyes fusiform, with several longitudinal brown 

 lines. Prothorax very finely scabrous, with four broad pale tawny stripes; 

 structure like that of C. concisa. Prosternal spine like that of C. concisa. 

 Spines of the hind tibiae with black tips, those on the inner side much 

 longer than those on the outer side. Wings pellucid; veins pale. Fore 

 wings pale yellow towards the base. Length of the body 21 lines; expan- 

 sion of the tore wings 42 lines. 



The hind tibiae are much shorter than the hind femora, and are 

 shorter and have shorter spines than those of C. concisa. 



a. East Africa. Presented by Earl Russell. 



25. CYRTACANTHACRIS PURPURIFERA. 



Fcem. Testacea ; caput antice hexayonali> strigis duabus lateralibus 

 viridibus lanceolatis ; prothorax breviusculus ; prosterni spina 

 albida ; alee anticce diaphance, basi testacece, maculis duabus elongatis 

 fasciisque seplem exterioribits obliquis indeterminatis cinereis fusco 

 marginalia ; alee posticte diaphance, basi purpurece. 



Female. Testaceous. Head smooth ; fore part of the vertex depressed, 

 hexagonal ; a lanceolate green streak proceeding from each eye to the 

 mouth ; front thinly punctured, with four well-defined keels which diverge 

 towards the face. Eyes elliptical, with brown lines. Prothorax finely 

 scabrous, rather short, widened between the fourth transverse impressed 

 line and the hind border ; dorsal ridge slight; fore border and sides slightly 

 rounded; hind border much rounded. Prosternal spine whitish, moderately 

 stout, extending a little beyond the fore border of the mesosteroum. Hind 



