220 
The Ohio Xaturalist. 
[Vol. V, No. 2, 
10. The facial callosity on either side inside of the suture vellow, 
making the yellow stripe on the middle of the face appear 
wide proclivis 
The facial callosities on either side entirely black, making the vel- 
low stripe on the middle of the face appear narrow snrdus 
Chrysops carbonarius Walker. The synonymy given in the 
list has been worked out mainly by Osten Sacken and Miss 
Ricardo. The species has a wdde distribution and the uniformly 
black abdomen, light colored hairs on the sides of the thorax and 
hyaline spot at the l)ase of the fifth posterior cell of the wing, 
serve to sejtarate both sexes from related species. 
Chrysops ceras Towmsend. The near relatives of this species 
are to be found in Mexico. Townsend pointed out the differ- 
ences separating ceras from tanyceras O. S. and megaceras Bell, 
when he described it. I have not the proper material to offer 
any suggestions upon tvhat Townsend published. The peculiar 
structure of the antennae referred to in the key separates it frcm 
all described species of the United States and Canada. The 
whole body is brown with dark posterior margins to the abdom- 
inal segments. The dark color of the wings is confined to the 
costal margin and distal half ; the cross-band includes dark col- 
oration in the region of the stigma, at the bases of the firtt sub- 
marginal and first posterior cells, and conspicuous margins to the 
cross-veins and their intensections with the longitudinal veins. 
The apical spot is separated from the cross-band, and is mostly 
confined to the apexes of the marginal and first submarginal cells, 
although a trace extends into the second submarginal. The fur- 
cation of the third vein is prominently margined with dark brown. 
Chrysops coloradensis Bigot. The cheeks are yellow with the 
exception of a small brown spot near the eye, the frontal callosity 
is yellow with a narrow brown margin, the general color of the 
body is lighter than in proclivis, there are usually two spots on 
the second abdominal segment instead of a single geminate one; 
also the black on the third and fourth abdominal segments is 
somewhat reduced in extent and e.xists in the form of spots. 
Chrysops coquillettii n. sp. Female 9 millimeters, seme spec- 
imens slightly smaller. Facial and frontal callosities yellow, the 
latter with a dark margin, anterior part of cheeks a median line 
on face, and front exclusive of callosity, covered with bright yel- 
low pollen and grayish hairs; palpi yellow, antenna, first segment 
distinctly swollen, first two segments brown with black hairs, 
third segment much longer than the second ; basal annulus dark 
brown, remainder black. Thorax with the usual stripes which 
are somewhat oltscured by thick grayish hairs; legs yellow with 
black at the joints and on apical part of anterior tibia-, all of 
anterior tarsi and last three or four segments of other tarsi. Wing 
with costal margin and cross-band black, apical spot fills out the 
