306 DIPTERA FROM SOUTHWESTERN UNITED STATES 



width of thJrd antennal joint at base of antennae, becoming narrower below, 

 cheek nearly twice as high as width of parafacial, margin with two to three 

 series of long bristly hairs, which are upwardly curved on the greater portion 

 of the series, vibrissal angle very slight, three to four bristles above vibrissa. 

 Thorax with long hairs and bristles, the former not dense; three pairs of long 

 presutural acrostichals; postsutural dorso-centrals three; prealar bristle a 

 little over one-third as long as the bristle behind it; sternopleurals one: two. 

 Abdomen rather strongly bristled; fifth sternite with slender processes, which 

 are armed with a few moderately long bristly hairs on their discs. Fore tibia 

 with one long posterior median bristle, the apex on posterior side with a long, 

 strong downwardly directed, slightly forward, or upward curved bristle which 

 is blunt at its apex as if broken off; mid femur wdth seven to nine closely 

 placed, long, slender bristles on basal half of postero-ventral surface; mid 

 tibia with five weak bristles, one antero-dorsal, two postero-dorsal, and two 

 postero-ventral; mid tarsus less than two-thirds as long as mid tiljia; hind 

 femur N\-ith four to six bristles on apical half of antero-ventral surface, the 

 postero-ventral surface unarmed; hind tibia with four to five short antero- 

 ventral bristles, four to five slightly longer antero-dorsal bristles, interspersed 

 on basal half with some setulose hairs, and three long postero-dorsal bristles, 

 posterior surface with four to five setulose hairs on basal half; hind tarsus 

 almost as long as hind tibia. Costal vein very thin to near apex of first vein; 

 costal thorn very small; outer cross-vein oblique, slightly curved. Length, 

 6 mm. 



Tijpe.— d'; Cloudcroft, New Mexico, May 26, 1902, [A. N. S. 

 No. 6221]. 



This species runs down to antiqua Meigen in an unpublished 

 key of mine, resembhng that species in having a blunt spine at 

 apex of fore tibia on posterior side and entirely black legs, but is 

 readily separated by the more hairy cheeks, much longer and 

 more widely spaced presutural acrostichals, longer prealar bristle, 

 shorter mid tarsus, and the tibial chaetotaxy. 



Hylemyia facialis sp. n. 



Male. — Black, slightly shining, densely gray pruinescent. Head black; 

 orbits, face, and cheeks wdth dense white pruinescence, when seen from the 

 side the orbit has an opaque testaceous yellow spot at base of antennae which 

 becomes black below, and a blackish browni spot at lower angle of eye, which 

 adjoins a yellowish mark on vibrissal angle of cheek; second antennal joint 

 rufous; palpi fuscous. Thoracic dorsum -^v-ith three narrow brown vittae. 

 Abdomen with a median black spot on base of each segment on dorsum; pro- 

 cesses of fifth sternite largely testaceous. Legs yellowish testaceous, coxae 

 grayish; tarsi fuscous. Wings clear; jimction of second and third veins, and 

 both cross-veins conspicuously brownish. Calyptra white. Halteres yellow. 



Eyes separated by width of anterior ocellus; orbital bristles on lower half 



