100 C. H. TYLER TOWNSEND. 



outward ; anteiinse clear rufous, second joint beset with short hlack bristles in 

 front, arista black; proboscis blackish, palpi pale rufous, bristly toward tip; oc- 

 ciput cinereous, clothed with sliort black hairs, with a fringe of black hairs on 

 border. Thorax silvery, with three well-developed moderately naiTow black 

 vittje extending to scutellum, the median vitta with a narrow lateral one on each 

 side extending to the suture; scutellum silvery; thorax and disc of scutellum 

 witii few macrochietfe. but clotlied with short black bristles; humeri and pleurse 

 silvery-white. Abdomen shining black, the basal half or more of second and 

 third segments pronounced silvery white; first segment also silvery-white at 

 base, sometimes wholly silvery-white, except the upper posterior border; anal 

 segment deep rufous, silvery-white at base; hypopygium deep rufous; first seg- 

 ment with a lateral pair of macrochfetse, second and third segments with a lateral 

 and a median marginal pair; anal segment with about ten marginal macrochfetse. 

 Legs black, femora and tibia more or less silvery on outer portions: claws and 

 pulvilli very long, pulvilli smoky-white. Wings grayish hyaline, slightly tawny 

 at extreme base; tegnlie almost pure white, halteres whitish. 



9. — Differs as follows: Front much broader; anus appearing as an additional 

 segment, with a row of marginal macrochsetEe, the whole deep rufous; claws and 

 pulvilli short. 



Length of body, 5.5 — 8.5 mm. ; of wing, 4—6 mm. 



Described from ten specimens, four males and six females, Las 

 Cruces, N. Mex., January 2d to July 28th; also two females, Cali- 

 fornia (Coquillett); and one female, California, April 9th (W. H. 

 Harrington). 



Eumacronyehia elita n. sp. % .—Eyes dark brown ; frontal vitta pale 

 tawny yellow; sides of front, face and cheeks pure silvery white, anterior pair 

 of ocellar bristles strongest, directed forward and strongly outward ; antennte 

 brownish, first two joints rufous, second joint with a strong bristle on front 

 edge ; arista blackish, thickened three-fifths its length, curved ; proboscis black- 

 ish, palpi yellow, tinged with rufous; occiput silvery, sparsely black-bristly. 

 Thorax silvery white, with three blackish vittse, the middle one narrow and in- 

 distinct, becoming lost near suture, the outer ones heavier and reaching scutel- 

 lum; scutellum silvery-white. Abdomen black, bases of segments two to four 

 very broadly silvery-white pollinose, first segment slightly so on sides; first seg- 

 ment with a lateral macrochseta, second with a lateral one and a median mar- 

 ginal pair, third and anal segments each with a lateral and a median marginal 

 pair; hypopygium blackish. Legs black, front femora silvery-white on outside, 

 femora and middle and hind tibite bristly; pulvilli very long, yellowisli white, 

 claws short, concolorous. Wings grayish hyaline, tegulse pure white, halteres 

 dusky. Length of body, 4.5 mm. ; of wing, 3.5 mm. 



Described from one specimen; Las Cruces, N. Mex., July 7th. 



SARC09IACR0IVYCHIA n. gen. 



Medium sized to small, rather elongate species, grayish, with vit- 



tate thorax and rufous anus, bearing a striking resemblance to Sar- 



cophagidie, but easily distinguished by the bare arista. Belongs in 



Tachininie. Head more or less hemispherical ; front somewhat 



