224 
The Ohio Naturalist. 
[Vol. VIII, No. 2, 
Tabanus quinquemaculatus n. sp. Length 12 millimeters. 
A black species with gray striped thorax and a small white 
triangle on the middorasl line of each of the first five abdominal 
segments. The general aspect is that of a small specimen of 
Tabanus coffeatus. 
Female. Front of ordinary width, clothed with white dust 
below and dark dust and black hairs above; frontal callosity shin¬ 
ing black; about half as wide as the front and connected with a 
rather short narrowed extension above; antennae entirely black, 
first segment enlarged and somewhat produecd at the anterior 
upper corner, third segment cut out above so that a distinct but 
not an elongate tooth is formed at the base. Palpi light colored 
and clothed with black hairs. Thorax black above with rather 
narrow gray stripes; wings hyaline, although there is a brownish 
tinge visible over much of the basal half; legs black, basal two 
thirds of the middle and hind tibiae reddish brown. Abdomen 
black, posterior margin of each segment narrowly white expand¬ 
ing into a small white triangle in all but the last two. Much of 
the body, especially the under parts, is clothed with sparse 
hairs. 
Female taken near Morales, Guatemala, March 3, 1905, where 
it was resting on a freight car. 
Tabanus nefarius n. sp. Length 22 millimeters. General 
color brown, wings brown, margins of the transverse veins and 
the furcation of the third vein infuscated. Abdomen with a 
middorsal row of gray triangles, each of which connects with a 
grayish yellow posterior border of its respective segment. 
Front rather narrow, sides parallel, frontal callosity light 
brown, a little narrower than the front, slightly elongated and 
connected above with a narrow line, which reaches above the • 
middle of the front. Space just above the antennae and the 
cheeks clothed with yellow dust, face below the antennae clothed 
with lighter dust. Antenna light brown with the annulate por¬ 
tion of the third segment darkest; first segment rather long 
clothed with black hairs which are most conspicuous above, 
second segment with conspicuous black hairs at apex, third seg¬ 
ment elongate with a prominent tooth above, basal portion much 
longer than the annulate portion; palpi concolorous with the an¬ 
tennae, nearly as long as the proboscis which is black. Thorax 
with rather indistinct gray stripes, legs of nearly the same color 
as the body; front femora, apexes of front tibiae and all the tarsi 
slightlv darker than the other parts; wings uniform brownish with 
infuscated margins to the transverse veins and the furcation of 
the third vein, first posterior cell closed or nearly closed. Abdo¬ 
men, in well preserved specimens, brown with a middorsal row 
of rather small gray triangles and rather wide grayish yellow 
posterior margin to each segment. 
