1921] NATURAL SCIENCES OF PHILADELPHIA. 235 



its length. Dorsal surface of abdomen unspecialized, latero-caudal 

 angles very bluntly rounded. 8upra-anal plate simple, transverse, 

 curled ventrad, about half as long as width between cerci, free mar- 

 gin concave about cerci, broadly convex in portion between these. 

 Subgenital plate symmetrical, lateral margins broadly convex and 

 forming a weakly defined obtuse-angulation beneath cerci, con- 

 vergent one-quarter the distance between the cerci on each side, 

 there sharply but briefly emarginate and at these points curled in- 

 ward, forming a short cone, the open base of which is caudad and 

 within which, springing from the extremities of the median sec- 

 tion of the caudal margin, project caudad on each side, two minute, 

 slightly curved spines; median section of caudal margin transverse, 

 subchitinous. Ventro-cephalic margin of cephalic femora armecl 

 with a row of spines which decrease gradually in size distad, ter- 

 minating in two elongate spines, of which the more distal is the 

 longer. Limb armament, pulvilli, tarsal claws and arolia as char- 

 acteristic of the genus. Teeth of flange on tarsal claws well de- 

 veloped, the last tooth half as large as the point of the claw. 



Surface shining. Head with vertex blackish brown to ocellar 

 areas, there with a broad transverse band of ochraceous-buff, mar- 

 gined ventrad by a band of blackish brown which is nearly as broad, 

 eyes hazel, antennae and remaining portions of face translucent 

 clay color, the latter with two interrupted bands of blackish brown. 

 Pronotum translucent, tinged with cinnamon-buff laterad, with 

 two broad blackish longitudinal bands which fuse at the cephalic 

 margin and diverge caudad, area between these clay color, with a 

 longitudinal heavil}^ suffused streak and two lateral dots of blackish 

 brown and a dot of cinnamon-bufT cephalad. Tegmina translucent, 

 tinged with cinnamon-buff proximad in anal field and beyond to 

 first branch of median vein and also from just beyond discoidal 

 vein in entire costal marginal area, from there to discoidal vein 

 suffused with mummy brown and in entire discoidal field suffused 

 with dresden brown as is the anal sulcus. Wings transparent, 

 rather heavily tinged with mummy brown, the narrow area of the 

 enlarged portion of the costal veins light ochraceous-buff. Dorsal 

 surface of abdomen prouts brown, deepening to mummy brown 

 distad. Cerci dresden brown, tinged with mummy brown proximad. 

 Ventral surface of abdomen dresden brown, maculate with mummy 

 brown. Limbs and spines buckthorn brown, cephalic femora suf- 

 fused dorsad and along ventro-caudal margin with mummy brown, 

 tibiae with blotches of mummy brown at base of each dorsal spine. 



Length of body 11.5, length of pronotum 2.7, width of pronotum 

 3.3, length of tegmen 12.1, width of tegmen 3.3 mm. 



The type is unique. 



LIOSILPHA Stal. 



1874. Liosilpha StSl, Bihang till K. Svensk. Vet.-Akad. Handl., Band 2, 

 No. 13, p. 10. 



