62 MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
The recognition of this species is based upon a specimen collected 
on a horse at Rio Ruidoso (about 6,500 feet), White Mountains, N. 
Mex., by Townsend and compared with the types either by Townsend 
or Coquillett. Zabanus gilanus has sometimes been confused with 
T. intensivus but can be distinguished by the less extensive light gray 
on the abdomen and by the black hind tibial fringe. 
TABANUS LATICEPS Hine 
(Fig. 19, A) 
Tabanus laticeps Hine, Ohio Nat. 5: 239, 1904. 
Rather small; grayish, with three rows of spots on abdomen, the sublateral 
spots oblique, the median spots slender but expanding at hind margins of 
tergites; frons rather wide; subcallus yellowish and somewhat shiny. 
Female.—Length 13 mm. Eye with rather sparse, short pile, purple, with 
two rather broad green bands. Frons yellowish gray tinged with orange at 
level of median spot, about three times as high as width at basal callus and 
distinctly widened above; basal callus shiny chestnut brown to black, slightly 
wider than high, rounded, not quite touching eyes and narrowly joined to the 
concolorous median callus; the latter about half width and slightly longer than 
height of basal callus; vertex with a large, shiny, black or brown spot, not 
\ 
Ficurw i9.—Antenna, front view of head, and palpus of (4A) Tabanus laticeps and 
(B) T. fairchildi. 
bearing a distinct ocellar tubercle; subcallus and top of genae yellowish brown, 
the former either with thin pollen or denuded. Clypeus and rest of genae 
white, with white hair. First two antennal segments yellow orange, with black 
hair, the first not swollen above; third reddish from base to dorsal angle, 
black beyond, the dorsal angle and dorsal excision slight: annulate portion 
slightly longer than width and shorter than length of basal portion. Second 
palpal segment stout at base and tapering to a rather slender apex, creamy 
white, with white hair and a few scattered black ones. 
Mesonotum black, with rather distinct grayish or brownish stripes in usual 
pattern; prescutal lobe reddish. Pleura, sternum, and coxae gray, with white 
hair. Wing hyaline throughout, the veins brown, venation normal. Femora 
black; basal half of fore tibia yellowish, with pale hair, apical half dark, with 
black hair; middle and hind tibiae orange brown, scarcely darkened at apices; 
hind tibial fringe black; tarsi dark brown, the fore tarsus darkest. 
Abdomen dark brown, with three rows of light-yeliowish-brown spots and 
sometimes the ground color orange brown on side of abdomen basally; the 
median row of spots consisting of a small round spot on first tergite and T- 
shaped spots on tergites 2-4, the horizontal bar of each T resting on hind margin 
of tergite; sometimes faint indication of similar pattern on tergites beyond 
fourth; sublateral spots oblique, touching hind margin, and extending to lateral 
margin, of each tergite; venter a mixture of gray and reddish. 
Male.—EKye with dense, short pile, the upper and lower facets not greatly 
different in size but the line of differentiation rather distinct. Frontal tri- 
angle flat, rather dark brownish, the upper half denuded. Rest of body colora- 
tion as in female. 
Cotypes.—In the collection of Ohio State University. A male and 
a female in the United States National Museum are probably part of 
the original series. 
Cotype localities —California and Washington. 
