Dec., 1904.] 
Tabanidae. 
239 
ment is rather narrow, basal part quite long, upper angle slightly 
prominent, annulate portion decidedly shorter than the basal 
portion. The form of the third antennal segment is sufficient to 
separate it from gilanus. The male is like the female in colora- 
tion. Length 14 to 15 millimeters. Reported from Colorado 
and New Mexico. 
Tabanus laticeps n. sp. Female; Length 12 to 14 millimeters. 
Head distinctly wider than the thorax, eyes pilose; antennae with 
first two segments and base of third red, remainder black; first 
segment rather large with upper anterior angle narrowly black, 
third segment rather long and narrow, basal prominence distinct, 
basal part slightly longer than annulate, front rather wide sides 
nearly parallel, frontal callosity dark brown, shining, narrowly 
connected with a prominent denuded spot above, ocellar area 
large, whole front thinly covered with gray pollen, and upper part 
with some dark hairs which are most numerous at the apex ; face 
clothed with white hairs, palpi very light colored, with short 
white hairs. Thorax dark with about five narrow gray lines 
above, antealar callosity red, sides and sternum clothed with gray 
hairs; legs with all femora, tips of anterior tibige and nearly all 
the tarsal segments dark brown or black, otherwise red; wings 
hyaline with stigma and veins clear brown, no stump on the 
anterior branch of the third vein. General color of the dorsum 
of the abdomen black, gray as follows; a row of small dorsal tri- 
angles and on each side a row of prominent oblique spots with 
their bases on the posterior margins of the segments. In some of 
the specimens the black is largely replaced by red and in all the 
ground color beneath the lateral spots is red ; venter of abdomen 
red with apex dark, or in some of the darker sfjecimens a rather 
wide median fuscous band extends from base to apex. 
Male; Length 12 to 14 millimeters. Like the female except 
the gray spots on the abdomen are smaller thus increasing the 
extent of the black. 
Specimens collected by Mr. D. W. Coquillett and Sarah E. 
Harris, and others sent in by Professors V. L. Kellogg and Charles 
W. Johnson without collector’s name. 
Habitat, California and Washington. The wide head is 
characteristic of the species. 
Tabanus laticornis n. sp. Female; Length 14 to 16 milli- 
meters. Eyes pilose, antennae red with the exception of the 
annulate portion and sometimes the apex of the basal portion of 
the third segment, which are black; first and second segments 
with rather coanse short black hairs above; basal portion of the 
third segment as wide as long, above abruptly widened to basal 
third and gradually narrowed to beginning of the annulate por- 
tion, below gradually curved. Front very gradually narrowed 
anteriorly, frontal callosity nearly square, scarcely as wide as the 
