AMERICAN DIPTERA. 291 



A male before me from Cloudcroft, New Mexico, VI, 20, 

 1902 (Viereck), may be this species, I append a brief de- 

 scription. 



Bare, brown pollinose. Front and face silvery. Antennae black 

 with third joint ovate (Fig. 5), rather abruply spiniform apically. 

 Mesonotum and scutellum opake, brown pollinose or the latter sub- 

 opake ; humeri yellow ; pleurae and metanotum gray ; halteres black- 

 ish. Abdomen subopake, brownish, with lateral apical margins of 1-4 

 segments and broad apical margin of fifth whitish ; hypopygium more 

 shining, as long as fifth segment; cleft extending to base (Fig. 57); 

 intermediate lobe visible, ventral lobe small, yellowish. Legs black 

 with apices of femora and bases of tibiae yellow ; apices of tibiae and 

 all tarsi brown ; apical flexor series of femoral bristles minute, and 

 middle tibiae distinctly bowed. Wings long (5 mm.), brownish-hyaline, 

 with the stigma brownish (Fig. 141). Length, 4.5 mm. ; wings, 5.0 

 mm. 



13. P. subopacus Loew. 



9 . Front black ; face silvery. Antennae black, long white acumi- 

 nate. Mesonotum subopake, thinly brownish-gray pollinose ; pleurae 

 cinereous ; metatotum densely so ; halteres yellow. Abdomen brown- 

 ish-black, almost shining; first apically, lateral angles and ventral 

 margins of following segments, cinereous. Ovipositor straight, as long 

 as segments 2-5. Legs yellow, with femora, except apices, tibial rings 

 and apices of tarsi, black. Wings grayish, with colored stigma equal- 

 ling fourth section ; third section of fourth vein twice second. Length, 

 3.5 mm. ; wings, 3.7 mm. 



Described from District of Columbia. Also reported from 

 Mexico (1892 Williston 88) and Canada (1901 Chagnon 13). 

 I cannot locate this species, with certainly, among the ma- 

 terial at hand. Dr. Hough (1899 Hough 79) describes a 

 male which he considers this species, having a small non- 

 cleft hypopygium ; and I have some before me which agree 

 except in having unusually large non-cleft hypopygium, but 

 which seem to belong to females of another species having 

 very short ovipositor, confraternus Banks. However, I have 

 a female from North Carolina which may be this species, but 

 I am rather doubtful, and will give a description of it as 

 follows : 



Head and mesonotum, unfortunately, are very greasy and in no con- 

 dition for description, but it seems that the front is only silvery on 

 lower part, and the third antennal joint is light colored and long acu- 



TRANS. AM. ENT. SOC, XXXVI. (*37) JANUARY, 1911. 



