242 
The Ohio Naturalist. 
[Vol. V, No. 2, 
The black palpi is a character it shares with sequax but the 
denuded subcallus and the black unspotted abdomen easily dis- 
tinguish it. The costal cell is also much blacker than in the last 
named species. 
Tabanus productus n. sp. Female: Length 11 millimeters. 
Antennae black, first segment rather long and narrow, third not 
much excised above and with a small basal prominence; frontal 
callosity square, l)lack and as wide as the front with uncofmected 
square black spot above it; front rather wide slightly narrowed 
anteriorly and clothed with gray ])ollen ; face and cheeks covered 
with gray pollen and white pile, palpi white with white bairs and 
also some that look black from certain views; eyes naked. Tho- 
rax dark with narrow gray stripes above and white pile on the 
sides and beneath ; legs black except about one-third of front 
tibise and more than half of the other tibiae which are white ; wings 
hyaline with clear brown stigma and veins and with a long 
oblique stump at the base of the anterior branch of the third vein. 
This stump has a direction which is nearly parallel with the last 
section of the posterior branch of third vein. Abdomen dark 
with a middorsal gray stripe and on each side a series of some- 
what oblique spots joining one another end to end, thus forming 
a stripe with the outer border serrate ; posterior margins of the 
segments l)oth above and beneath narrowdy whitish. 
Male; Length 11 millimeters. Colored in detail like the other 
sex ; line of separation of large and small facets of the eye distinct. 
Specimens taken near Lander, Wyoming, at an elevation of 
from .3000 to 7000 feet the past summer by R. C. Moodie of 
Lawrence, Kansas. 
This species looks some like lineola but is smaller, the legs and 
antennas are darker and the distinctive stump on the anterior 
branch of the third vein differs from what I have observed in that 
species. 
Tabanus punctifer Osten Sacken. Distributed over a great 
deal of the western country, especially from Colorado to Cali- 
fornia and southward. The general black color of the body 
except the thorax, wdiich is covered with white pile and the white 
base of the anterior tibiae, makes it the easiest western species to 
distinguish. Length 19 to 22 millimeters. 
Tabanus rhombicus Osten Sacken. Osten Sacken described 
this species in his ‘‘Prodrome” and later in his “Western Dip- 
tera” gave additional notes upon it. At the time of the latter 
writing, he had better material than wdien he first wrote, and 
from this material he characterized three forms, as he called 
them, which when arranged in series appear quite distinct from 
one another ; and present characters by which in good specimens 
they can be separated readily. 
