53 



sides of face bare except for tlie row of macrocliiTeta', cheeks 

 two-fifths as wide as the eye-height; thorax thinly gvay polli- 

 nose, marked with four bUick vittse; scutelhim bearing three 

 pairs of h)ng inarginal niacrocha't;«; abdomen snbshiniug, bases 

 of hist three segments bghtly whitish poUinose, first segment 

 bearing a marginal pair, second with a discal and a marginal 

 pair of macrochu;ta>, third with a discal pair and a marginal 

 row, fourth wholly covered except the extreme base; wings 

 tinged with brown along the veins; calypteres yellowish white; 

 length, 7 mm. Fort Wrangel, Alaska. A single female speci- 

 men collected by II. F. Wickham. Type No. 30.31, U. S. 



National Museum nirinosa n. sj). 



Sides of face each bearing only one or two macrochtnetjx!, situ- 

 ated near lower end of eyes; black, the antenna', palpi, tip of 

 scutellum and fourth segment of abdomen yelloM^; front in both 

 sexes one and two-thirds times as wide as either eye, the sides 

 and face yellowish pollinose, two pairs of orbital bristles, frontals 

 descending to base of third antennal joint, sides of face covered 

 witli black bristly hairs, cheeks three- fourths as broad as the 

 eye-height, antennae three-fourths as long as face, the third joint 

 six times as long as the second, arista thickened on tjie basal 

 third or half; thorax gray pollinose, marked with three black 

 vitta?, scutellum bearing three long marginal i^airs and a short 

 apical pair of macrocha^ttTB ; abdomen thinly gray pollinose, 

 -subshining, last three segments bearing discal macrochicta^; 

 wings subhyaline, veins faintly clouded with brown; length, G to 

 7 mm. Opelousas, La. Three males and one female collected 

 in March, 1897, by Mr. G. E. Pilate aeiigena n. sp. 



^ Genus ADMONTIA Br. and Berg. 



Admoiitia Braner and Bergenstamm, Zweif. Kais. j\Ins. Wieu, IV, p. 104; 1889. 



On page 410 of Part Y of the above-mentioned work, a species from 

 "N. Amer.'Ms listed us ^^Admontia mnericana n.," but no description 

 of it has to my knowledge been published. Our fetn^-species have only 

 three postsutural macrochieta' : 



1. Wings wholly hyaline, or slightly smoky costally, usually three 



sternopleural macrocha^t;ie 2. 



Wings whitish hyaline to small crossvein, the remainder brown 

 except the hind margin, which is hyaline; only two sternopleu- 

 ral macrochiipta', palpi yellow, legs black, arista thickened to 

 beyond the middle, cheeks one-half as broad as the eye height; 

 length, 7 mm. Northern Illinois. ( Journ. N. Y. Ent. Soc, Vol. 

 Ill, p. 55; June, 1805.) nasoni Coq. 



2. Legs black, t wo x>airs of orbital bviwtlca in both .sex es 3. 



Legs and palpi yellow, no orbital bristles in the male, arista thick- 

 ened on less than the basal third, cheeks one-third as broad as 



