148 A nnals Entomological Society of A merica [Vol .II, 



may or may not have a preapical reddish band; each tibia plainly 

 reddish at the base and this color is not always well defined below 

 and may extend nearly the whole length, especially on the upper side; 

 tarsi black although the metatarsi are often largely reddish; wings 

 hyaline with the apex and the inner margin of each faintly gray. 

 Abdomen dark, differing slightly according to the angle from which 

 it is viewed, posterior margin of each segment plainly gray. 



Specimens are at hand from British Columbia collected by Harvey, 

 Venables and R. S. Sherman ; Ormsby County, Nevada, by C. F. Baker; 

 several counties in southern California by Coquillett ; also from Eldo- 

 rado County, California, and from Oregon and Washington. 



The fact that the male genitalia are bent upward near the middle 

 as shown in the figure, serves to designate the species. It is much like 

 Asilus notatus of the eastern states but in the male the extension of 

 the ventral margin of the eighth abdominal segment with its dense 

 tuft of long hairs, is distinctive and in both sexes the form of the third 

 antennal segment is a useful character. In occidentalis this antennal 

 segment is plainly wider than in notatus. 



Asilus auricomus n. sp. (Figs. 8 and 9). 



General color yellowish gray, mystax largely composed of golden 

 yellow bristles, also, yellow bristles before the incisures of the abdomi- 

 nal segments. Legs yellow with an elongate black marking on the 

 anterior side of each femur and a black spot at the apex of each tibia. 

 Length 15 millimeters. 



Front and face rather narrow and covered with yellowish gray dust. 

 Facial gibbosity rather prominent, reaching half way to the antennae, 

 furnished with vellow bristles intermixed above with a few black ones. 

 Beard gray, occipito-orbital bristles yellowish gray. Antennae black, 

 third segment of each exclusive of the arista about equal in length 

 to the other two; arista decidedly longer than the third segment. 

 Thorax yellowish gray with the usual dark markings; scutellum 

 clothed all over with rather long yellow hairs and with two yellow 

 bristles on the margin. Wings hyaline on the basal part, and grayish 

 at the apex and along the inner margin. Legs largely shining yellow; 

 coxae dark, clothed with gray dust and yellow hairs; each femur 

 with an elongate black marking on the middle of the anterior side ; 

 each tibia with a black spot at the apex of the anterior side; tarsi 

 infuscated, especially on the apical part of each segment; pulvilH 

 yellow. Abdomen yellowish gray with yellow hairs on the segments 

 and several yellow bristles on each side before the incisures. Male 

 appendages, viewed from above, widest near the apex ; each appendage 

 black on the basal part and yellowish distally. 



Several specimens of both sexes from Medina County, Ohio, taken 

 in August. Others from lona, N. J., collected by E. Daecke, New 

 Haven, Connecticut, by R. L. Butrick, southern Illinois by C. A. 

 Hart, and from Germantown, Pa. 



