214 PROCEEDINGS OF THE NATIONAL MUSEUM vol. S8 



3. Expanse 50 or more mm. ; tip of abdomen without tuft of long hair, 



lower part of slope black with minute tubercles ; at base of 

 intermediate segment is a few bristle-bearing warts each side 



of the median groove amplus 



Expanse scarcely 40 mm 4 



4. Hind tibiae with a row of long, curved, white hairs behind, 



small species ; crest of black hairs near tip of abdomen, above 



slope minimus 



Hind tibiae without the long white hairs 5 



5. Tuft of long rufous hair near tip of abdomen above the slope; 



usually some bristle-bearing warts on the metascutellum grahami 



No tuft of long hair near tip of abdomen difficilis 



6. Hind tibiae with long white hairs behind; median teeth broad 



and low mimicus 



Hind tibiae without the long hairs behind ; median teeth high and 



more narrow brevis 



P. szechuanensis Martynov I have not seen ; the figures of genitalia 

 appear different from any I have seen. 



PSEUDOSTENOPHYLAX AMPLUS (McLachlan) 



Plate 29, Figubes 35, 39 



Described as a Halesus; a pair from 9 miles from Tatsienlu, the 

 type locality, and Hai Tsi Ping near Tatsienlu, August 5, 13,000 feet. 

 The male has four spurs to hind tibia, the female but three. They 

 agree very well with the description in size and coloration. The 

 male has a broad black area at tip, thickly studded with minute 

 tubercles, and below it in the middle, apparently as part of the upper 

 piece (but I do not think so) is a deep black horseshoe-shaped piece, 

 each lower end bending out in a process, and apparently the part 

 referred to by McLachlan. Seen from side, the clavate superior 

 appendages hang down, and the intermediate are slenderer, the 

 lower appendages curving upward and covering over half the 

 genitalia. 



Tlie lower appendages from below are short on the imier edge, 

 very long on outer side, the apical margin concave. 



The female, from above, shows a broad median piece angularly 

 notched in middle, each tipped with a slender finger ; on each side of 

 this central part is a broad rounded lobe, with an oval depressed 

 hairy area; below this upper part is a broad pale lamina, its outer 

 margin heavier, and broadly emarginate in the middle; below the 

 latter is a still larger projection, the middle part pale, the broadly 

 rounded almost projecting side lobes are black. From these genitalia 

 it is evidently a Psevdostenophylax in the sense of Martynov; but 

 the hindwings show no specialized hairs or scales in anal area; but 

 there are many tubercles on the membrane and much long fine hair. 



