THE JUMPING GROUND BUGS. 647 



KEY TO EASTERN' GENERA OF €RYPTOSTEMMATIDJE. 



a. Front width of scutellum over one-half that of hind margin of 

 pronotum; eyes projected outward, not overlapping front angles 

 of pronotum (fig. 2) ; head and tibiae with strong bristles; pro- 

 pleurae of moderate or small size, never swollen in front below 

 the eyes; elytra with a fracture near middle of costa which does 

 not extend onto disk, the venation as in fig. 1. (Subfamily Cryptos- 

 temmatinse) . I. Ceratocombus, p. 647. 



aa. Front width of scutellum not over one-third that of hind margin of 

 pronotum (fig. 8) ; eyes projected both outward and backward, 

 overlapping front angles of pronotum (figs. 12, 14 and 18) ; head 

 and tibiae without strong bristles ; propleurae much swollen, ex- 

 tending forward to or beyond front margins of eyes (figs. 6 and 

 12) ; costa without a fracture. (Subfamily Schizojjterinas) . 

 b. Metapleurum produced in the form of a sharp spike at inner hind 

 angle (fig. 7) ; and (in our species) with an elevated strongly 

 curved cross-ridge which is paralleled on sides and behind by an 

 impressed line (fig. 10) ; first costal cell of elytra larger than 

 second, the vein bounding apical margin of second cell joining 

 costa at almost a right angle (fig. 9). II. Schizoptera, p. 649. 

 bb. Metapleura never with a pronounced spike at inner hind angle; 

 first costal cell of elytra normal, equal to or smaller than second, 

 the vein bounding apical margin of latter joining costa obliquely 

 (fig. 13). 

 c. Elytra but slightly convex, not entirely heavily coriaceous; claval 

 suture distinct. 

 d. Head declivent, not conically produced (fig. 12) ; pronotum with- 

 out a transverse impressed line near front margin ; first and 

 second costal cells subequal in length (fig. 13). 



III. CORIXIDEA, p. 650. 



dd. Head pox-rect, produced forward in the shape of a cone (fig. 14) ; 

 pronotum with a distinct impressed line near front margin; 

 costal cells as in fig. 16. IV. Nannocoris, p. 651. 



cc. Elytra strongly convex, entirely coriaceous, their venation evi- 

 dent; claval suture obsolete; eyes very large, overlapping half or 

 more of side margins of pronotum (fig. 18). 



V. Glyptocombus, p. 652. 



I. Ceratocombus Signoret, 1852, 542. 



Very small oblong-oval species having the head subcorneal, 

 slightly longer than wide, beset with several pairs of bristles, 

 vertex strongly convex; antennae long-haired throughout, joint 

 2 three times or more as long as 1 (fig. 2) ; beak reaching 

 first ventral; pronotum convex, slightly wider than long, in 

 our species with a distinct transverse subapical impression, 

 humeral angles rather prominent ; elytra coriaceous, entire, 

 surpassing abdomen, in repose conjointly subtectiform, the 



