240 
The Ohio Naturalist. 
[Vol. V, No. 2, 
front, shining brown, with spindle shaped spot above; otherwise 
whole front including ocellar area and subcallus, covered with 
grayish yellow pollen. Face and cheeks covered with grav pollen 
and rather long white hairs ; palpi white clothed with short white 
and black hairs mixed. A noticeable thing is that the hairs on 
the palpi in a number of species appear Vjlack from certain views 
while from other views the same hairs appear white. This seems 
to be the case here. Thorax black above thinly covered with 
gray jllen and with the usual gray stripes ; sides and sternum 
with rather long white hairs. Legs in general red. anterior 
femiora and tarsi and apex of tibiae, basal half or more of middle 
and posterior femora and three or four distal segments of middle 
and posterior tarsi fuscoiis or black. Wings hyaline, stigma yel- 
lowish, also costal cell and narrow margins of some of the cross- 
veins dilute yellowish. Abdomen with a rather narrow dorsal 
black stripe on which is a row of small elongate gray triangles; 
lateral rows of spots large and red, largest on second segment and 
decreasing toward apex of abdomen ; a fuscous patch on each seg- 
ment outside of the rows of red spots. Venter red with apex and 
a midventral stripe, abbreviated in some specimens, black. 
i\Iale; Length 14 to 15 millimeters. Colored like the female, 
abdomen decidedlv attenuated posteriorly. Third antennal seg- 
ment not so wide as in the female. 
Several specimens from Arizona and northern Mexico, those 
from the latter locality collected by C. H. Tyler Townsend. 
Tabanus lineola Fabricius. This well known eastern species 
extends as far west as Utah and Colorado. The naked eyes are 
sufficient to separate it from the western species resembling it. 
Length 13 to 15 millimeters. 
Tabanus opacus Coquillett. The female type of this species 
is dark colored with gray stripes on the thorax and three rows 
of grav spots on the abdomen. Wings hyaline with brown 
stigma, and a long stump on the anterior branch of third vein. 
Antennae black with the first segment partially reddish ; subcallus 
not denuded, legs black with basal half of front tibiae and nearly 
all of the other tibiae reddish. On the second and third segments 
of the abdomen the ground color beneath the lateral gray spots is 
reddish and there is also a suggestion of reddish on the sides of 
the second segment, but the latter is so small that it is hardly 
worth mentioning. 
The male is colored like the female except the reddish on the 
sides of the first two abdominal segments is slightly more extended 
and there is a trace of reddish at the base of the third antennal 
segment. The stump of the anterior branch of the third vein is 
only suggested in this sex. 
A number of specimens before me agreeing with the female 
type were collected in southern Idaho, Logan, Utah, by E. D. 
