222 The Ohio Naturalist. [Vol. V, No. 2, 



The male which hitherto has not been described, is much 

 darker than the female; the antennae, proboscis and four small 

 spots on the face are black ; the facial callosities are shining yel- 

 lowish, otherwise, the face is covered with gray pollen. Thorax 

 dark with gray hairs and well marked gray, stripes above ; legs 

 mostly black with the exception of the middle and hind tibiae, 

 which are largely yellow. Wings black with various sized hya- 

 line spots in all the cells except the costal, marginal and fifth 

 posterior; axillary cell almost altogether hvaline. Abdomen black 

 with narrow lateral margins and rather wide posterior margins 

 of the segments gray. On the second to the fifth segments the 

 posterior border sends forward three extensions besides the lat- 

 eral margins. Venter of the abdomen gray with three rows of 

 black spots. Length, 10 millimeters. 



Two males, one from Utah and the other from Montana. The 

 latter sent in by Prof. R. A. Cooley, who has also contributed 

 other material of interest from that State. 



Chrysops excitans Walker. So far as western species of 

 Chrysops are concerned this one is readily separated from all 

 others by the absence of an apical spot on the wing and the bi- 

 colored abdomen. The second basal cell infuscated on more than 

 basal half separates it from sordidus of the eastern states. 



Chrysops facialis Townsend. Female: Antennas blackish 

 above, yellowish beneath on first two segments ; first segment dis- 

 tinctly enlarged but: not so darge as in some related species. 

 Facial callosities shining black or dark brown, remainder of face 

 yellow. Frontal callosity shining black, yellowish on disk. 

 Ocellar area large, black, nearly reaching the eye on either side. 

 Thorax black with yellow stripe on each side above the root of 

 the wing ; clothed everywhere with rather long yellow hairs. Legs 

 yellow with joints, apical half or more of anterior tibiae, and all 

 the tarsi except metatarsi blackish ; wings with costal margin and 

 cross-band black. The hyaline triangle crosses the second vein 

 contributing a small spot to the marginal cell, the apical spot fills 

 out the apexes of the marginal and first submarginal cells and 

 extends into the second submarginal; otherwise the apex of the 

 wing beyond a line from outer end of the stigma to distal end of 

 vein separating third and fourth posterior cells is hyaline. Also 

 apical half of first basal, two-thirds of second basal, all of the anal 

 except apical narrowed part, and all of axillary are hyaline. The 

 distal half of fifth posterior cell is infuscated, but not so strongly 

 as the basal half. Abdomen black and yellow, black as follows: 

 Large spot beneath the scutellum, two spots united at base on 

 middle of second and third segments, four spots united basally 

 on fourth and fifth segments, and all of remaining segments 

 except narrow posterior margins. Ventrally a wide stripe on 



