1921] NATURA.L SCIENCES OF PHILADELPHIA. 277 



rather strongly concave. Supra-anal plate nearly symmetrical, 

 slightly over half as long as basal width, brief lateral margins weakly 

 convex and almost transverse to median produced portion; this 

 portion strongly convex, the convexity extending to the base of the 

 plate, the free lateral margins consequently curled downward, round- 

 ing distad into the transverse, subchitinous distal margin, this por- 

 tion as long as its basal width, tapering evenly and gentl}^ distad 

 where it is supplied with a few, elongate, scattered hairs; ventral 

 surface unspecialized but furnished thickly at the disto-lateral 

 rounded angles of the produced j^ortion with minute spiniform 

 hairs, these slightly the heavier on the dextral side and there ex- 

 tending to the Imse of the produced portion. Within the anal cham- 

 ber, adjacent to the sinistral cercus, the socket is developed in a 

 minute rounded lip without production, adjacent to the dextral 

 cercus the corresponding section is produced in a triangular pro- 

 jection, twice as long as its basal width, the caudal surface of which 

 is very deeply concave. Paired plates beneath supra-anal plate 

 developed into large lobes, apparently unarmed; the sinistral plate 

 expanding mesad into a very large rounded lobe, which extends 

 two-thirds the distance to the dextral cercus. Titillator with apex 

 simple, aciculate. Subgenital plate strongly convex, with surface 

 supplied rather heavily with microscopic hairs, lateral margins con- 

 sequently dorsal in position, straight produced, then curving broadly 

 ventrad, so that the margin beyond in dorsal aspect is transverse; 

 internal surface toward free margins and styles as hairy as external 

 surface. Sinistral style a stout, straight, cylindrical process, tap- 

 ering, slightly shorter than dextral style. Dextral style heavier, 

 springing from a minute offset of the margin, curved weakly sinis- 

 trad with a weak median angulation, proximal half stout and 

 slightly tapering, distal half more strongly tapering to the apex, 

 which, like the dorsal portion of the distal half, is armed with min- 

 ute spines. Armament of limbs as characteristic of the genus. 

 Four proximal tarsal joints supplied ventro-distad with small but 

 readily observed pulvilli. Moderately well developed arolia pre- 

 sent between the bases of the slender, simple, symmetrical tarsal 

 claws. 



Head auburn, shading to buffy on mouthparts; ocelli warm buff. 

 Antennae buffy proximad, shading rapidly to dresden brown. Dis- 

 tal joint of palpi prouts brown. Pronotum shining, auburn, with 

 a medio-longitudinal suffused tawny line and cephalic and lateral 

 margins narrowly translucent buffy, caudal margin tawny, these 

 paler marginal portion not sharply defined. Tegmina translucent, 

 light chestnut brown with costal field dark chestnut brown in inner 

 half and warm buff in half toward costal margin, costal veins dis- 

 tinctly darker than intervening areas. Wings very weakly suffused 

 with brown, area of costal veins darker, particularly the veins them- 

 selves. Dorsal surface of abdomen buffy proximad, the greater 

 portion laterad and distad chestnut In-own. Cerci chestnut brown. 



