80 AMERICAN DIPTKRA. 



Abdomen reddish-brown, with some irregular brown markings above, the last 

 segment and hypopygium more yellow; very hairy, like the thorax ; hypopy- 

 gium small, turned forward under the preceding segment. 



Legs brown, with the same woolly hair; preapical bristles of fore and hind 

 tibise very slender; middle tibia with a stouter preapical bristle and a cluster of 

 about five apical ones, of different sizes, the two or three largest distinctly 

 curved ; tarsi gradually infuscated, with large, whitish pulvilli. 



Wings with a faint brownish cast, the veins near the base, and the subcostal 

 cell yeli()wish ; costal setse of medium size. 



Length 8 mm. ; of wing, the same. 



Female. — A little lighter in color, the hair everywhere shorter, and the bristles 

 better developed, about as strong as in the average of the family. 



Three females and two males. Aldrich: Moscow, Idaho, and St. 

 Anthony Park, Minnesota. Johnson : Montreal, Canada, June 

 20th. U. S. N. M. : Ungava Bay, Hudson Bay Territory, L. M. 

 Turner, Nos. 280 and 4186. 



This is evidently a wide spread northern form ; the type locality 

 is Sitka, and it has been reported from White Mountains, New 

 Hampshire. 



Leria pubescens Loew. 



Length of body 7.3 ram. ; of wing, 8.1 mm. 



Head, including the occiput, yellow; front entirely yellow, rather densely 

 pubescent; vertical bristles rather long and stout; antennte yellow, first two 

 joints reddish-yellow; arista long and slender, only microscopically pubescent; 

 vibrissffi one on each side, rather long and stout; cheeks straw-yellow, about 

 three-fifths the width of the eye. 



Dorsum of the thorax cinereous; the humeri and the lateral edges of the dor- 

 sum somewhat reddish ; a rather distinct median brown line runs almost the 

 length of the thorax ; the dorso-central bristles arise from brown spots, which 

 are almost confluent ; the dorsum rather densely pubescent ; scutellum reddish- 

 yellow, bare except the ordinary four bristles; mesopleura reddish-brown, rather 

 sparsely pubescent; besides one strong bristle, the sternopleura has rather dense 

 and fairly long pubescence. 



Abdomen brownish, densely covered with long, black pile; the posterior 

 edge of each segment reddish-yellow; hypopygium of the male of medium size, 

 yellow. 



Wings with a brownish tinge; cross-veins very slightly infuscated; all the 

 veins distinctly brown. 



Legs reddish-yellow, densely pubescent all over; a rather long, brown spot at 

 the apical end of the front tibia; last three tarsal joints of the front legs, the 

 last two of the middle legs, and all those of the hind legs black. 



One male, one female. Brues : Horseshoe Cave, Door County, ^ 

 Wisconsin, July 13th. ^ dt^^^-^O^ ^ ^.L lo-v-u C^^-c^a -. ettl 



This species was reported from caves in Indiana ; see note by 

 Blatchley under (Ecothea fenestralis. 



