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 1-1 to 15 millimeters. Reported from Colorado 

 and New Mexico. 



Tabanus laticeps n. sp. Female: Length 12 to 1-1 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 tibiae and nearly all 

 the tarsal segments dark brown or black, otherwise red; wings 

 hyaline with stigma and veins clear Ijrown, 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 specimens 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 b}^ 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 1(3 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 coarse 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 



