356 Professor Williston on the 



densely grey pollinose in front ; first and second segments with a 

 single pair of strong median bristles ; third segment with a 

 posterior row ; fourth bristly on the posterior half. Legs black ; 

 posterior surface of the front femora broadly grey pollinose ; claws 

 and the yellowish-brown pulvilli nearly as long as the last two 

 joints taken together ; hind tibiae with strong, unequal bristles on 

 the posterior side. Tegulse white. Wings nearly hyaline, or with 

 a light blackish tint ; small cross-vein a little before the middle of 

 the discal cell. 



$ . Front less yellowish, and with orbital bristles ; pulvilli 

 and ungues not longer than the fifth tarsal joint. 



Length 9-11 mm. 



Five specimens. This species is, apparently, an 

 Exorista in the sense of Brauer and Bergenstamm. 



A.TE0PH0P0DA. 



Townsend, Trans. Amer. Ent. Soc, xix., 373, 1892; 

 Vanderwulpia, Townsend, Trans. Amer. Ent. Sqc, 

 xix., 381, 1892 ; Microchira, Brauer and Bergen- 

 stamm, Muse. Schizometopa, iii., 138, 1893; 

 TFwZpm, Brauer and Bergenstamm, Z.c, 1893. 



1. Atrophopoda townsendii, n. sp. (PI. XI., figs. 93, 

 head and part of antenna of S ; 93a, tarsus of c? ; 

 93 &, tarsus of $ ; 93c, wing.) 



(J , $ . Frontal row of bristles descending to the lower border 

 of the eyes ; eyes bare ; costa with spine ; first posterior cell long 

 petiolate. Male claws and pulvilli not enlarged. Length 4-5 mm. 



Front shining bluish beneath the silvery pollen, the median stripe 

 black. Face silvery ; sides narrow. Antennae black ; second joint 

 red ; third joint seven or eight times longer than the second in the 

 male ; in the female more slender and a little shorter ; arista in the 

 male bare, in the female with long pubescence, subplumose. Palpi 

 yellow, a little dilated at the tip. Thorax bluish-grey, opaque ; 

 mesonotum with two, rather broad, deep-brown stripes, extending 

 from the front margin to the scutellum. Abdomen long-ovate in 

 shape ; opaque bluish-grey ; the first segment and the posterior part 

 of the second and third segments shining black, the black reaching 

 well toward the front margin in the middle ; first, second, and third 

 ijegments with a pair of erect marginal bristles ; third segment 

 with a single lateral one ; fourth segment with a posterior row. 

 Legs black ; pulvilli and ungues of the male small on all the feet ; 

 of the female, rudimentary on the front pair, the terminal joints 



