1918.] NATURAL SCIENCES OF PHILADELPHIA. 191 



and ventral margin to shortly ventrad of the humeral sinus oblique 

 arcuato-truneate, the infra-humeral section of the margin distinct 

 obtuse-angulate, the humeral sinus rectangulate with the immediate 

 angle rounded. Tegmina surpassing the apices of the caudal femora 

 by about the length of the pronotal disk, in form somewhat elongate, 

 lanceolate, the greatest width contained three and one-third times 

 in the tegminal length; costal margin gently arcuate in distal half, 

 nearly straight in proximal half, sutural margin distad of the anal 

 field straight except for the oblique arcuato-truncate distal fifth, 

 apex rotundato-rectangulate, situated nearer the costal than the 

 main portion of the sutural margin; mediastine vein short, irregular, 

 ramose; humeral and discoidal veins contiguous in proximal two- 

 fifths ; median vein diverging slightly proximad of proximal two-fifths 

 of length, bifurcate, the rami reaching the sutural margin; ulnar 

 vein straight except for brief distal arcuation; transverse nervures 

 numerous and regular in discoidal field. Wings surpassing the 

 tegmina in length by a distance nearly equal to the dorsal length 

 of the pronotum, apex moderatelj^ acute. Prosternum unspined; 

 mesosternum with the lobes rotundato-acute-angulate; metasternum 

 with the lobes rounded laterad and caudad, hardly any caudo- 

 median production indicated. Abdomen with the disto-dorsal 

 abdominal segment faintly tectate in section, weakly produced 

 mesad, with a distinct but not wide rectangulate emargination, 

 which is bordered laterad by low, rounded, thickened areas of the 

 margin reflexed toward the ventral surface; supra-anal plate reflexed, 

 trigonal; cerci simple, crassate, tapering to delicate apices, gently 

 arcuate; ovipositor slightly more than half again as long as the 

 dorsum of the pronotum, regularly narrowing in depth distad, the 

 proximal half moderately arcuate, distal half straight, the immediate 

 apex obliquely subtruncate, the apex, distal portion of dorsal margin 

 and apex of ventral valves serrulato-denticulate ; subgenital plate 

 elongate, compressed, fissate for about one-half its length, the 

 resultant lateral lobes diverging and embracing the base of the 

 ovipositor, each regularly tapering in width to the subaciculate 

 apex. Cephalic and median femora unarmed beneath; cephalic 

 tibiae with four spines on the dorso-caudal margin; median tibiae 

 with five to six spines on the same margin. Caudal femora slightlj' 

 more than two-thirds as long as the tegmina, robust in proximal 

 half; genicular lobes short bispinose; ventro-external margin of 

 caudal femora with eight short, flattened, sublamellate spines, 

 ventro-internal margin with ten similar spines. Tarsi without 

 arolia. 



