24 
The Ohio Naturalist. 
[Vol. VII, No. 2, 
The species is colored much like nigrovittatus as given below. 
However, the thorax is a steel gray while in the last named 
species this part is gray but very slightly tinted with yellowish. 
Specimens are rather narrow and elongate and the length appears 
to be of specific value, at least such is the case with the specimens 
at hand. The males of the two species are very different: in 
conterminus the head is very large, as in costalis, and the area of 
enlarged facets extends back to the occiput above, while in 
nigrovittatus the head is small with the area of enlarged facets 
confined to the disc, a band of small facets occupying the upper 
part of the head forward as far ar one-fourth the length of the 
line of union of the eyes. Length of both sexes 12-14 mm. 
Habitat: Specimens are at hand from Beaufort, N. C., 
collected by Sherman; Avalon and Cape May, N. J., and Fer- 
nandina, Florida. 
Tabanus costalis Wiedemann. This species is well known 
over a large part of North America. The thorax is decidedly 
yellow, the wings are hyaline with the costal cell yellowish- 
brown and the abdomen varies some in coloration, but the mid- 
dorsal band is always present, regular and yellow in color; in 
living specimens the eyes are crossed by a single green band. 
Length, 11-15 mm. 
Tabanus fuscicostatus n. sp. General color fuscous; front of 
normal width, vellowish-gray in color, sides nearly parallel, 
frontal callosity brown nearly square and with a line, usually 
unconnected above, antenna rather long, basal segment slender, 
third segment with a well defined basal process above and with 
the annulate portion black or at least dark, palpi white, pro¬ 
boscis black; face, sides and ventral part of the thorax clothed 
with white pollen and pile; disc of the thorax gray, unstriped; 
legs reddish in general coloration, all the femora often cinereus 
on basal part, apical part of each anterior tibia and all the tarsi 
brownish; wing hvaline with the costal cell dark, fuscous in 
most specimens; abdomen with a distinct middorsal stripe which 
has a tendency to increase slightly in width at the posterior 
border of each segment, and a row of spots on each side. Length 
of the female 10-15 mm. 
Type locality Baton Rouge, Louisiana, but specimens are at 
hand from various parts of that state. From dry specimen-- the 
species can easily be placed under sagax for the color of legs and 
abdomen are right for that, but when the living specimens are 
studied it is found that the eye is crossed by only a single green 
band which, with the colored costal cell, would denote realtion- 
ship with costalis. The male was not procured. 
Tabanus guatemalanus n. sp. Head very large, eyes pilose; 
general color dark brown, some specimens approaching reddish; 
antenna red with the annulated portion of the third segment 
