212 PROCEEDINGS OF THE NATIONAL, MUSEUM vol.88 



discal cell for more than width of the cell ; fork three also back for 

 about a cell's width. In hindwing fork one is also back on discal 

 cell more than width of cell. 



Length of fore wing, 32 mm. ; width, 11 mm. 



One specimen of this fine large species from near Washan, Szech- 

 wan, China, 4,000 to 6,000 feet, July. Type, U. S. N. M. No. 53167. 



Genus PLATYPHYLAX McLachlan 



PLATYPHYLAX RUBESCENS Martynov 



Plate 29, Figure 40 



Described from a female from Yatung, Tibet. Two females agree 

 fairly well with the description and figure. The males have very 

 striking genitalia. The tip of the last abdominal segment is bent 

 down in a broad lobe, which is covered with stout black spines ; below 

 (from side) is a pale elongate superior appendage, and below this the 

 intermediate hooklike processes, its tip (seen from side) has a slender 

 inner prong and a rounded outer lobe; from below are two broad 

 truncate lobes, each tip with stout hairs, and above these are two curved 

 reddish spinelike pieces, with a long tooth near tip and another not 

 quite so long nearer to base, seen best from behind. 



In most of the males the wing membrane is slightly brownish and 

 with many small pale spots; hair on face largely yellowish, black 

 each side by eyes, those on vertex mostly pale, but some black each 

 side, those on mesonotum mostly pale, a few of those over wing base 

 are darker or nearly black. 



Specimens are from 9 miles southwest of Tatsienlu, June 25-27, 

 8,500 to 13,000 feet; 0-Er, 26 miles north of Li Fan, August 16; 

 Yachow, August 27-30 (all Szechwan) ; and Jeddo Pass, 12,000 to 

 15,000 feet, July 17, China-Tibet border, and Yiel Long Shien, Au- 

 gust 3-6, 13,000 to 15,000 feet, China-Tibet border. Pseudopotamorltes 

 peniculus Forsslund appears to be very close to this species, but 

 Forsslund's figures show slight differences in details. I see but little 

 resemblance to Potamorites^ but if Platyphylax is to be divided, the 

 generic name may be kept. 



Genus PSILOPTERNA Martynov 



PSILOPTERNA SINENSIS, new species 



Plate 29, Figubes 49, 50 



Head and body pale yellowish, abdomen darker above toward tip ; 

 palpi, antennae, and legs pale, unmarked; hair on face pale, but 

 some black each side by eye, that on vertex pale, that on thoracic 

 notum pale, and above the wing base but little darker. 



Forewings pale yellowish, a little darker in anal area and near 

 cubitus, the outer margin also faintly darker, no distinct irrorations ; 



