1922] NATURAL SCIENCES OF PHILADELPHIA 277 



cephalic margin weakly convex mesad, cephalic sulcus deep, 

 longitudinal sulcus extending from median point to caudal sulcus, 

 caudal sulcus moderately deep, lateral lobes with V-sulcus deeper. 

 Lateral lobes of pronotum longer than deep, ventral angles broadly 

 rounded, ventral margin straight and slightly oblique, humeral 

 sinus distinct. Tegmina and wings fully developed, extending well 

 beyond apex of abdomen, the latter extending nearly three milli- 

 meters further caudad than the former. Tegmina as broad meso- 

 distad as mesad, apex rather strongly rounded and slightly nearer 

 costal than sutural margin. Wings long and rather broad, not 

 parachute-like. Eighth tergite broad. Ultimate tergite truncate 

 produced, its surface weakly concave declivent to apex, beneath 

 which it is armed with two uncinate spines, the apices of which 

 project dorso-caudad. Beneath these are two heavier, curved 

 spines, springing from chitinous supra-cereal plates. Cerci elongate 

 and very slender. Beneath the cerci are heavy plates, directed 

 mesad, with disto-cephalic angle produced in a curved spine. Sub- 

 genital plate weakly convex, except latero-distad where it is 

 weakly concave, supplied with large socketed styles, between which 

 it is produced in two narrow, rounded projections which extend 

 caudad nearly to the median portion of the styles and between which 

 a narrow U-shaped median emargination is formed. Cephalic 

 and median tibiae armed with the usual number of spines of average 

 length. Caudal femora stout and short, ventral margins armed 

 with six internal and eight external small but stout spines, which 

 increase in size distad. 



Head with labrum, clypeus, face and two proximal antennal 

 joints ochraceous-buff, shading to buckthorn brown on occiput; 

 eyes bordered caudad with a suffusion of prouts brown, which is 

 continued ventrad to the clypeus as a weak, subocular, vertical 

 suffusion. Remaining portions of antennae cinnamon brown. 

 Pronotum prouts brown with two flecks of buffy meso-laterad on 

 disk and a similar fleck before ventro-cephalic angle of each lateral 

 lobe, lateral lobes and caudal portion of disk fading to buffy toward 

 margins. Tegmina with anterior field to near apex and narrow 

 portion toward costal margin hyaline, in other portions very 

 weakly and evenly tinted with prouts brown, veins and veinlets 

 prouts brown. Wings hyaline showing the faintest of brown 

 tinting, except distad in anterior field where they are very weakly 

 tinted with prouts brown, veins prouts brown, veinlets very slender, 

 tinged with that color. Body and limbs ochraceous buff, the tibiae 

 and trrsi suffused with tawny. Spines of caudal femora tawny, 

 becoming chestnut brown at apices. 



Length of body 32.5, least width of vertex 1.7, length of pro 

 notum 5.9, length of tegmen 38, median width of tegmen 11.8, 

 length of cephalic femur 8.4, length of caudal femur 15.2, length of 

 longest cephalic tibial spine 1.8 mm. 



The type is unique. 



