292 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. 43. 



disappearing on upper part of lower half, upper half of frontal 

 stripe polished, occiput shining black above, silvered on lower por- 

 tions, antennae black, third joint elongate and sharply acuminate, 

 whitish on apical acuminate portion, arista swollen at base, brownish 

 black, thorax gray-dusted, particularly on margins, very few hairs 

 present, pleurae distinctly gray-dusted, scutellum shining except at 

 base, a few very weak marginal hairs present, abdomen ovate, shining, 

 except on lateral margins of all segments, first segment very short, 

 gray dusted dorsally, comb black, bristles not very long nor numerous^ 

 hypopygium viewed from above nearly as long as fifth segment, 

 symmetrical, only the terminal lobe visible, ventral organs con- 

 cealed; legs black, extreme apices of femora, apices and bases of 

 tibias and tarsi yellowish, no noticeable bristles present, the pubes- 

 cence short and not particularly thick nor noticeable, tibi^ and 

 femora more or less gray dusted; wings grayish, inner cross vein at 

 just beyond end of first vein, and at rather less than one-third from 

 base of discal cell, stigma colored; halteres fuscous. 



Length, 2 mm. 



One male, Medicine Hat, Alberta, Canada. October, 1911, 

 (Malloch). 



Type.— Ca.t. No. 14800, U.S.N.M. 



Allied to affinis Cresson, loewii Kirby, and duhius Cresson, but 

 in the descriptions of these species by Cresson ^ there are many dis- 

 tinctions from the above, one of which lies in the distinctly separated 

 eyes in the male of this species. 



PIPUNCULUS TOWNSENDI, new species. 



Male. — Eyes confluent for a longer distance than the length of the 

 frons, frons without distinct silvermg, face silvered, as broad as frons 

 at above antennge, nearly parallel-sided, antennae black-brown, 

 third joint not twice as long as broad, very little acuminate at apex, 

 arista lanceolate at base and distinctly tapermg for the greater part 

 of its length, occiput much less swollen than in most of the species 

 jn the group, and descending rather abruptly behind vertex, sUvered 

 on lower portions, but not above, thorax shining black, with distmct 

 white hairs which are longest and most numerous on the lateral mar- 

 gins, humeri yellow; pleurae brown, gray-dusted; scutellum shining 

 black, mthout distinct hairs; abdomen shining black, the bases of 

 all segments except first with broad, dull, velvety brown fasciae, 

 that on fifth segment produced centrally on posterior margm, fifth 

 segment gray-dusted low down on lateral margin, second segment 

 with a comb of numerous long, soft pale hairs, second segment nar- 

 rower than first and tapering posteriorly, not more than two-thirds 

 as wide at apex as third segment at apex, third segment one-third 



1 Trans. Amer. Ent. Soc, vol. 36, 1910, pp. 282-285. 



