230 



yellowish, elongate-conical, very slightly curved, extending to the meso- 

 sternum, which is piceous. Hind femora a little longer than the abdomen, 

 with three rows of black points above. Ilind tibia? as long as the hind 

 femora; spines white, with black tips, those of the inner row longer than those 

 of the outer row. Elytra pale-cinereous, rather longer than the wings ; veins 

 white, here and there black, and thus forming a discoidal stripe, which is com- 

 posed of streaks and patches. Wings pellucid, longer than the abdomen ; 

 veins white, black toward the tips. 



Length of body, 2 inches; expansion of the elytra, 4.1 inches. 



San Domingo (Walker). 



A. coiacolor. 



Syn., Cyrtacanthacris concolor, Walk., Cat. Dermap. Salt., IV, 610. 



Female. — Tawny, rather slender. Head short, smooth ; tip of the vertex 

 flat, sub-hexagonal; front thickly punctured; the four keels well defined, 

 diverging toward (the corners of) the face. Eyes elongate-elliptical. Antennae 

 slender, cylindrical. Pronotum finely scabrous, reddish toward the hind border, 

 with a slight keel, and with four well-defined transverse lines ; fore border and 

 sides slightly rounded; hind border elongated, angular. Prosternal spine 

 thick, oblique, rounded at the tip, extending to the meso-sternum. Hind 

 femora as long as the abdomen ; hind tibia? red, rather shorter than the hind 

 femora ; spines pale-yellow with black tips. Elytra and wings cinereous, as 

 long as the body ; the veins of the elytra tawny red toward the base. 



Length of the body 2 inches ; expansion of the elytra, 4.3 inches. 



Mexico (Walker). 



A. siiieulati'ix. 



Syn., Cyrtacanthacris simulatrix, Walk., Cat. Dermap. Salt., IV, 010. 



Alale. — Tawny, slender. Head and pronotum with two slender inter- 

 rupted black stripes. Head smooth ; , fore part of the vertex depressed, hexa- 

 gonal ; front largely punctured, with four well-defined keels, which diverge 

 slightly toward the face. Eyes ferruginous, elliptical. Pronotum finely 

 scabrous, with a slight keel, and with two much-abbreviated black stripes in 

 addition to the inner pair before mentioned ; keel not rounded, interrupted by 

 the transverse-impressed lines, which are distinctly marked ; frcfnt border and 

 sides' slightly rounded ; hind border mucli rounded. Prosternal spine oblirpir. 



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