ae OHIO STATE ACADEMY OF SCIENCE. 
TABANUS REINWARDTII Weidemann. 
Length 14-19 mm. Eyes pilose, palpi pale yellowish, antennae ~ 
black, sometimes first segment reddish; thorax brownish, thickly clothed 
with rather long gray hairs, above with white stripes; legs largely dark 
colored but the basal part of all the tibiae yellowish, this color is least 
extensive on the anterior pair; wings hyaline with the cross veins and 
bifurcation of the third vein margined with brown; abdomen with a 
middorsal row of prominent gray triangles and on either side of this 
a row of oblique gray spots which connect with the narrow gray hind 
margins of the segments. 
Female: Frontal callosity shining black, scarcely as wide as the 
front, slightly higher than wide and with a linear prolongation above; 
sides of the front parallel. 
Male: Thorax more thickly pilose than in the female, head ont 
slightly larger, eyes very distinctly pilose. 
Habitat: Cincinnati and Medina. 
TABANUS STYGIUS Say. 
Length 20-22 mm. Third segment of the antennae red at base, 
blackish at apex, first and second segments and palpi dark; legs black, 
often the tibiae reddish at base; wings yellowish brown with the posterior 
border approaching hyaline, a brown spot on the bifurcation of the third 
vein, also the transverse vein closing the discal cell margined with 
brownish; abdomen uniform black. 
Female: Thorax dorsally plainly whitish pollinose with more in— 
tense longitudinal lines. 
Male: Thorax dorsally uniform grayish brown in well preserved 
specimens. 
Habitat: Sandusky, Wauseon and Cincinnati. 
It is closely related to nigrescens, but in the specimens before 
me the wings have more color on the anterior part than in that 
species. In nigrescens the dorsum of the thorax is shining black, 
thinly whitish pollinose on anterior fourth in both sexes, there- 
fore the difference in color in this region is distinctive when 
dealing with perfect specimens. However, the males are very 
close at best, and easily confused. 
It resembles punctifer somewhat, but this species has the 
front tibia white on basal third and the thorax uniformly white 
in both sexes. 
The females oviposit on Sagittaria growing in shallow water 
at Sandusky, and on a previous page I have fully described aru 
process. 
TABANUS SULCIFRONS Macquart. 
Length 18-21 mm. Palpi brownish, antennae nearly black with the 
third segment brownish at base; legs dark, bases of tibiae darker; 
wings with a distinct brownish tinge, cross veins at the end of the 
discal cell and bifurcation of the third vein margined with brown. 
