442 KANSAS UNIVERSITY SCIENCE BULLETIN. 



Leptis palpalis, n. sp, 



Male : Head black, occiput, frontal triangle, face and cheeks 

 gray pollinose and white pilose ; proboscis and palpi yellow, 

 pile of latter black ; antennae dark fuscous, tip of second joint, 

 and third wholly, yellowish, arista black. Thorax black ; meso- 

 notum brownish pollinose, marked with a hair-like line in the 

 middle, two subdorsal broader ones, and lateral margins gray 

 pollinose, pile black ; humeri testaceous, scutellum likewise, with 

 base and pile black ; plurt^ gray pollinose, pile above front coxse, 

 and on metapleurse white ; halteres yellow. First, second, 

 third and fourth abdominal segments, except in middle and on 

 sides, yellow ; remaining segments, except narrow posterior 

 margins, black ; pile black. Coxae black, with white and black 

 pile, trochanters black, femora, except poorly defined brown- 

 ish ring in middle of the two anterior pair, and apical half of 

 hind pair, yellow ; four front tibiae yellow, hind ones and all 

 tarsi fuscous. Wings hyaline, with a subfuscous tinge, most 

 prominent on anterior half and along veins ; stigma elongate. 

 Length, 10.5 mm. 



One specimen ; Washington. 



Chrysops pachycera Will. 



Numerous specimens of each sex from the Bill Williams 

 Fork, Arizona, compared with the types convince me that the 

 male and female specimens Doctor Wiiliston had before him are, 

 as he then suspected, and as Townsend later believed, of dif- 

 ferent species. Furthermore, it has been pointed out to me 

 (thanks to Prof. Jas. S. Hine)that the male of Doctor Williston's 

 types is the male of C. prodivis O. S. Therefore the name 

 pachycera must stand for the females of that description, to 

 which I will add the following notes : The shining black in- 

 tervals on the mesonotum are, in perfect specimens, covered 

 with pollen which causes an apparent darker ground color on 

 these parts. The pollen on these stripes is very easily dis- 

 lodged, however, and in a large series of specimens one will 

 find a goodly number presenting these vittae shining. The 

 pollen of the scutellum is also easily rubbed off and leaves a 

 shining ground color. The color of the female abdomen is 

 variable. In some specimens the dark markings are very indis- 

 tinct, especially on the first and second segments. In others 



