240 The Ohio Naturalist. [Vol. V, No. 2, 



front, shining Ijrown, with spindle shaped spot above; otherwise 

 whole front including ocellar area and subcallus, covered with 

 grayish yellow pollen. Face and cheeks covered with gray 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 black 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 pollen and with the usual grav stripes; sides and sternum 

 with rather long white hairs. Legs in general red, anterior 

 femora 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 fuscous or black. Wings hvaline, stigma vel- 

 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 mid ventral stripe, abbreviated in some specimens, black. 



Male: Length 14 to b5 millimeters. Colored like the female, 

 abdomen decidedly attenuated posteriorly. Third antennal seg- 

 ment not so wide as in the female. 



Several specimens from Arizona and northern Mexico, those 

 from the latter localitv collected bv 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 lo millimeters. 



Tabanus opacus Coquillett. The female type of this species 

 is dark colored with gray stripes on the thorax and three rows 

 of gray spots on the abdomen. Wings hyaline with brown 

 stigma, and a long stump on the anterior branch of third vein. 

 Antennee 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, b}' E. D. 



