168 Psyche [October 



except near the arista; arista with very short and close pubescence. Proboscis 

 blackish, palpi whitish. Chaetotaxy as in ornata, the bristles long and strong: 

 two f ronto-orbitals ; ocellars almost reaching the root of the antennae; postverticals 

 moderately long and cruciate; oral margin of the narrow cheeks with a row of 

 five hairs, with a strong vibrissa and with a strong bristle in back; five dorso- 

 centrals, four rows of aerostichals with about a dozen setulae in each; one humeral; 

 two notopleural; three supra-alar; four scutellar; one mesopleural and two 

 sternopleural, as well as a few mesopleural and sternopleural setulae. Abdomen 

 setulose as in ornata, and with an indication of a brownish median stripe. Hal- 

 teres and calypteres white, the latter with a weak white fringe. Posterior legs 

 yellowish, front coxae dull whitish, remainder of the front legs blackish. Wings 

 mostly hyaline, but marked with about two dozen pale brown spots, the largest 

 of which occur at the end of the first vein, in the tip of the marginal cell and on 

 the posterior cross- vein. The spots are aggregated in the same general pattern 

 as in ornata, but are not nearly so confluent as in that species. 



The type, collected by Professor T. D. A. Cockerell at Pecos, 

 New Mexico, July 26, is in the National Museum. Two para- 

 types were taken by H. S. Barber at Las Vegas Hot Springs, 

 New Mexico, August 11 and 18. 



4. Trixoscelis fumipennis, sp. nov. 



Male. Length 2.5 mm. Very close to the European T. marginella Fallen, but 

 differs in that the paler portion of the first and second posterior cells is not oval 

 in outline. 



Head and thorax, largely brownish-gray pollinose; front except the orbits and 

 the rounded ocellar triangle testaceous; orbits at the antenna? reddish; face and 

 cheeks white-sericeous; cheeks two-thirds the eye-height; antennae reddish, the 

 third joint largely dusky above; arista black, its pubescence microscopic; palpi 

 yellow, proboscis reddish. Ocellar bristles reaching to the base of the antennae. 

 Thorax with a median brown stripe and with less evident brown vittae bearing 

 the dorso-central bristles; humeri and pleurae reddish, becoming paler below; 

 center of the scutellum a trifle darker than the sides: abdomen shining black. 

 Coxae, front tibiae and posterior legs testaceous; front femora and tarsi blackish. 

 Halteres and calypteres white. Wings largely darkly infumated, but the base, 

 including the auxiliary cell, a narrow streak in the submarginal cell above the 

 anterior cross-vein, the anterior portion of the discal cell, a middle stripe in the 

 first posterior cell extending to the wing-tip, the greater part of the second posterior 

 cell, and the anal angle, nearly hyaline; costal spines black; anterior cross-vein 

 slightly beyond the middle of the discal cell; sections of the fourth vein propor- 

 tioned three to four, of the fifth vein six to one; posterior cross-vein slightly longer 

 than the outer section of the fifth vein. 



Five specimens: Aweme, Manitoba, N. Criddle, collector, June 

 12, 1911. The type is in the collection of the Philadelphia Acad- 

 emy of Science, number 6018. Paratypes are in the collections 

 of Mr. Criddle and myself. 



