314 DIPTERA FROM SOUTHWESTERN UNITED STATES 



one weak antero-dorsal, and two stronger postero-ventral bristles; fore tarsus 

 verj'^ slightly compressed, longer than tibia; mid femur with irregular bristles 

 and hairs on antero- and postero-ventral surfaces, longest on basal half and 

 especially on that of postero-ventral surface; mid tibia with one antero- 

 dorsal, two postero-dorsal, and three to four posterior bristles, the latter in 

 an irregular series; mid tarsus shorter than mid tibia; hind femur with a series 

 of strong, rather irregular bristles on antero- and postero-ventral surfaces, 

 those of the latter not continued to apex; hind tibia with five to seven uneven 

 antero-dorsal, and three to four postero-dorsal bristles, the posterior surface 

 with about nine strong, suberect, setulose hairs; tarsus shorter than tibia. 

 Costal thorn short; outer cross-vein oblique, distinctly curved. Length, 4.75 

 mm. 



Type.— d'; Cloudcroft, New Mexico, May 27, 1902, [A. N. S. 

 No. 6218]. 



This species closely resembles one which I have described in a 

 paper now in the press, from Alaska, but the latter differs in 

 having one posterior hind tibial bristle, the wings yellowish, and 

 in some minor details. Another closely allied species is described 

 herewith. 



Hylemyia anthracina sp. n. 



Male. — Similar in color to the preceding species, the thorax and abdomen 

 more distinctly vittate, and the wings clearer. 



Eyes separated by width across posterior ocelli; parafacials in profile broader 

 than in mimetica, their width exceeding that of third antennal joint and nearly 

 equal to that of cheek; arista pubescent, the longest hairs not as long as basal 

 diameter of arista. Presutural acrostichals rather irregular, three to four 

 pairs; prealar bristle more than half as long as the bristle behind it. Abdo- 

 men as in mimetica, but the fifth sternite with longer strong bristles especially 

 at apices of processes, where in the type they are cruciate. Fore tibia with 

 two posterior bristles; mid femur with a series of five to seven bristles to be- 

 yond middle of postero-ventral surface; armature of hind femur as in preceding 

 species, that of hind tibia differing essentially in having five to seven very 

 short posterior setulae on median third, none of which are longer than the 

 diameter of tibia, whereas in mimetica the bristles are longer than the tibial 

 diameter and extend from base to near apex. Venation as in mimetica, but 

 the outer cross-vein is straight. Length, 5.2.5 mm. 



Type.— d"; Hood River, Oregon, June 21, 1917, [Coll. Hhnois]. 

 This species is inserted here because of the close resemblance to 

 mimetica, and its western origin. 



Hylemyia sp.? 



One male in collection differs from any North American species 

 . known to me in having the acrostichals in front of suture nearly 



