1909] Rohherflies of the Genus Asilus 159 



bv a white interval ; legs black with not more than a suggestion of red- 

 dish at the bases of the tibiae, coxae with white hair, femora with some 

 white hair and black bristles, other parts of the legs with short black 

 hairs and prominent black bristles; wings hyaline, faintly gray at the 

 apex and along the posterior border. Abdomen black with rather 

 long gray hairs especially toward the base, and with the posterior 

 border of each segment gray. The male appendages shining black, 

 rather slender, elevated on distal half and about as long as abdominal 

 segments six, seven and eight together. Oviduct shining black, dis- 

 tinctly compressed laterally, end lamella free and style like. 



This species must have somewhat the appearance of Asilus anony- 

 mus Williston, from Mexico, but there are only two bristles on the mar- 

 gin of the scutellum, the third antennal segment is of about the same 

 length as its arista, and there are other differences 



A male and female taken in couple at Southern Pines, North Caro- 

 lina, Mav 15, 1908, by A. H. Manee for whom the species is named. 



Asilus delusus Tucker. 



Gray brown. Preapical band and the posterior side of each femur 

 red. Under side of each front femur with numerous rather long white 

 hairs. Length 16-lS millimeters. 



M3"stax with numerous white hairs below and a few black ones 

 above. Occipito-orbital bristles mostly black above, white on either 

 side; thorax gray brown, mid-dorsal black stripe well defined, bristles 

 on the posterior part prominent and black. Wing hyaline, clouded 

 at the apex and along the posterior border. Front femur with the 

 anterior side black, preapical band and the posterior side red; tibiae 

 and tarsi mostly red, each tibia with a stripe on the anterior side and 

 the apex dark, apex of each tarsal segment brown; middle leg the 

 same; hind leg similar but the dark coloring of the tibiae more suf- 

 fused. Abdomen gray brown, narrow posterior margin of each seg- 

 ment plainly gray. 



Specimens from Kansas and Montana, those from Kansas being the 

 types. 



This was described as a variety of annulipes Macquart by Tucker 

 whose identification of annulipes conforms to specimens called snowii 

 in this paper, as I have determined by a study of the specimens used 

 by Tucker. I agree that dehisus is related to snowii but has a dis- 

 tinct general color over the entire body, the posterior side of each 

 femur red and the third antennal segment shorter than in that species 

 with the arista two thirds as long as the segment which bears it. 



Asilus johnsoni n. sp. (Figs. 32 and 33). 



Body bright yellowish, femora black outwardly, otherwise legs 

 largely red, wing reddish, hyaline along many of the veins. Mid-dorsal 

 stripe of the thorax prominent, brown and reaching the scutellum in 

 nearly its entire width. Male genitalia uniformly red. Length 17-21 

 millimeters. 



Facial gibbosity not especially prominent, mystax composed of a 

 number of rather long pale yellow bristles below and a few shorter 



