156 Annals Entomological Society of America [Vol.11, 



on the anterior half and longer ones on the posterior half. Wings 

 hyaline, anal angle in the male with a small white area. Front leg 

 with the apex of the femur, tibia and metatarsus except the apex of 

 each, and the bases of the other tarsal segments yellow, otherwise 

 black; middle leg similar but the femur is entirely black; hind leg 

 black except three fourths of the tibia which is yellow. Abdomen 

 shining black with a very narrow posterior margin to each segment 

 gray. Upper forceps of the male appendages shining black, of nearly 

 the same width throughout, superior side distinctly excavated at the 

 apex. 



The species is easily separated from affinis by the black forward 

 and middle femora and from coquillettii by the very much shortened 

 vestiture especially on the anterior half of the thorax. 



Both sexes from Kalso, B.C., sent in by Harvey and Sherman, and 

 a female from Los Angeles county, California, collected by Coquillett. 



Asilus sadytes Walker. 



This is the same as Asilus tibialis Macquart, which is preoccupied 

 by A. tibiahs Fabricius, Ent. Syst. (1793) IV, 3S3, 30; A. tibialis 

 Fallen from Europe, Dipt. Suec. Asil. (1814) 9, 4; A. tibiaHs Wiede- 

 mann from Russia, Zool. Mag. (1817) I, 2, 29. There are at least two 

 other species that have been described under A. tibialis, one from 

 the Cape by Macquart himself and the other by Gimmerthal from Russia. 

 Both of these latter have been named since the North American insect. 



Black, abdomen with white border to each segment, femora black, 

 tibiae and metatarsi largely reddish. Male forceps large and dis- 

 tinctly longer than abdominal segments six, seven and eight. Length 

 13-17 millimeters. 



Face and front clothed with white dust, facial gibbosity promi- 

 nent, mystax with numerous black hairs above and few white or pale 

 yellowish ones below, although the distribution of black and light 

 hairs varies through a series of specimens; antennae black, first two 

 segments longer than the third which is about equal in length to its 

 arista. Proboscis and palpi black, the latter with black hair. Beard 

 white, occipito-orbital bristles black, remainder of the vestiture of the 

 occiput white. Thorax rather thinly clothed with gray dust which 

 has a yellowish tinge above, mid-dorsal stripe black; wing hyaline, 

 apex and posterior margin slightly clouded; coxae colored like the 

 thorax, femora black, tibiae largely reddish but usually with black 

 markings on the outside, variable in a series of specimens; each meta- 

 tarsus reddish with brown apex, other tarsal segments black or brown, 

 each reddish at the base. Abdomen black with white posterior border 

 to each segment. Male forceps large and longer than abdominal 

 segments six, seven and eight. 



Specimens are at hand from Ohio, Ind., N. Car., Mass., N. Y. and 

 Pa. The species is common in sections of Ohio where I have col- 

 lected in August. 



