290 E. T. CRESSON, JR. 



unique in having the abdomen nearly shining, with hardly 

 any cinereous markings, and the large quadrate hypopygium. 



11. P. discolor Banks, n. sp. 



" d 1 . In the first section, with colored stigma and dull abdomen, the 

 third joint of antennae elongate, but not as much so as in P. subopacus, 

 and dark colored, not white as in that species. It is also larger than 

 that species. The face is silvery, the dorsum of thorax and abdomen 

 dull black, the latter only indistinctly hoary on the sides ; the legs 

 pale, all femora black, except at base and tip. The wings are long, 

 gray, with distinct stigma and black veins, the small cross vein before 

 end of first third of cell, and a trifle before end of auxiliary vein, 

 the stigma being quite long, anal cell closed much before margin. 

 The last segment of male abdomen is small and without cleft, but with 

 a cavity at tip ; the abdomen is longer than in P. subopacus, and does 

 not show the tufts of hair on venter seen in that species. Length 4.5 

 mm." 



Type.— Ithaca, N. Y., July {coll. Banks). 



Paratype. — Ithaca, N. Y., July, one <? (coll. Banks). 



I make the following notes upon examination of the type : 

 Front and face with yellow tinge ; antennas abruptly acumi- 

 nate (Fig. 27), somewhat sericeous; mesonotum and scutel- 

 lum subopake, brown pruinose ; humeri yellowish ; halteres 

 dark brown ; pleurae and metanotum faintly cinereous, the 

 latter more densely so ; abdomen opake, brownish ; hypopy- 

 gium (Fig. 52) rather large, as large as fifth segment; ter- 

 minal lobe subquadrate, brownish with large cleft ; basal 

 and lateral lobes just visible ; intermediate lobe visible 

 from above ; ventral lobe yellowish ; tarsi blackish apically ; 

 femoral spines not discernable ; stigma equalling fourth sec- 

 tion or a little longer (Fig. 177). 



This species comes near fuscitarsis Adams, from New 

 Mexico, but is probably distinct ; it is also similar to my 

 caudatus but not so shining, and has the hypopygium less 

 developed. 



12. P. fuscitarsis Adams. 



o 71 . Antennae black, short acuminate; mesonotum brown pollinose 

 with yellowish humeri and blackish halteres ; abdomen evenly brown 

 pollinose, with hypopygium cleft ; femora and tibiae mostly black ; 

 tarsi brown ; wings brownish with distinct stigma. Length, 4.5 mm. ; 

 wing, 5.2 mm. 



Described from New Mexico. 



