1874.] 269 [Scudder. 



Peorhachis nov. gen. (~po, pdx,iq?) 



Allied to Procolpia Stal. Antennae 22-23 jointed, as long as the 

 abdomen, joints 3-8 broadest and flattened, those beyond punetulate. 

 Eyes very prominent. Tubercle of vertex greatly produced, hori- 

 zontal, the part in front of the eyes being as long as the rest of the 

 head, slightly concave, tapering, the tip narrow but rounded, the lat- 

 eral edge with small, slightly upturned, triangular, median denticu- 

 lations ; viewed laterally it is subquadrate, the front edge very 

 strongly compressed to a thin edge without trace of sulcation. Pro- 

 notum with small rounded distant tubercles, a slight, uniform, sub- 

 serrate median carina, the front margin straight, but with a slight 

 triangular projection on either side of the middle ; hind border with 

 oblique sides, and a rather large, rounded, median lobe slightly 

 notched posteriorly. Tegmina longer than the abdomen, the front 

 margin considerably and roundly produced near the base; beyond 

 this the tegmina taper and are accuminate. Hind femora moderately 

 stout, tuberculate, rather flattened above; the superior lamina trace- 

 able only by the compressed tubercles, but at the extremity of the 

 joint very prominent, compressed, strongly carinate, abruptly docked 

 posteriorly, the carina slightly produced to a point ; hind tibiae with 

 a stout blunt tubercle next the base posteriorly, noticeable only on 

 a side view ; interior spines of same tibiae nearly three times as long 

 as the exterior. 1 



22. Prorhachis granulosa nov. sp. 



Dusky feruginous. Antennae reddish brown. Head uniform in 



1 Another genus allied to Procolpia, though not so closely as the foregoing, is 

 Molacris (aioAos, a/cpis) nov. gen. Antennae of about the length of the abdo- 

 men, joints 3-7 broadest. Eyes very prominent. Tubercle of vertex greatly pro- 

 duced, horizontal, the part in front of the eyes nearly or quite as long as the rest 

 of the head, and separated from it by a transverse sulcation, scarcely concave 

 apically, scarcely tapering, broadly x-ounded in front; viewed laterally it is trian- 

 gular, the oblique front edge strongly compressed to a thin edge, but delicately 

 sulcate, excepting above. Pronotum with lateral carina? which are very stout, 

 coarse, granulate and parallel in the posterior half, noticeable only as a series of 

 granulations and converging in the anterior half; front border angulated on 

 either side of the middle ; hind border produced and angulated at slightly less 

 than a right angle. Tegmina longer than the abdomen, subequal throughout, the 

 tip roundly docked. Hind femora slender, a little flattened above, with an equal, 

 very slight dorsal carina; inner row of spines on hind tibia? excessively long, the 

 upper ones compressed, broadly laminate at the base. Type Xiphicera octomacu- 

 lata Scudd. To this genus also belong X. Caternaultii Feisth. and X. octolunata 

 Serv. 



