HORSEFLIES OF THE SUBFAMILY TABANINAE 61 
It is quite apparent from the drawing given by Rowe and Knowl- 
ton that they had 7. intensivus before them and not 7’. gilanus. 
TABANUS GILANUS Townsend 
ig. 18°B) 
Tabanus gilanus Townsend, Psyche 8: 92-93, 1897; Hine, Ohio Nat. 5: 238, 
1904 
Rather small; blackish, with three rows of pale spots on abdomen above; a 
considerable amount of biack hair on venter; wing hyaline; hind tibial fringe 
black ; eye pilose. 
Female.—Length 13-15 mm. Eye with short pile, purple, with two green 
bands. Frons gray, tinged with yellow brown opposite median callus, about 
three times aS high as basal width, slightly widened above; basal callus shiny 
chestnut brown to black, subquadrate or rounded, somewhat protuberant; 
median callus an irregular, subshiny, black area narrowly joined to basal 
callus; usually a partially denuded, brownish spot at vertex, but no distinct 
tuberele; subcallus yellowish brown, denuded or thinly pollinose. First two 
antennal segments yellowish, with black hair, the first not noticeably enlarged; 
third black beyond dorsal angle, orange basally; dorsal angle distinct but 
obtuse above, the excision shallow; annulate portion about as long as basal 
portion. Clypeus and genae white, with white hair, the latter, near subcallus, 
yellowish brown, with an admixture of black hair. Palpus pale yellow orange, 
with white hair, the second segment stout basally, tapering to an acute apex; 
some black hair on second segment. 
Figure 18.—Antenna, front view of head, and palpus of (A) TJabanus intensivus and 
) T. gilanus. 
Mesonotum blackish, with five narrow gray stripes in usual pattern; pres- 
cutal lobe, upper half of mesopleurite, and extreme base of fore coxa reddish ; 
rest of pleura and coxae gray, with white hair. Wing entirely hyaline, with 
brown veins; venation normal. Femora gray; tibiae reddish, the apical half 
of fore tibia black and apices of others darkened; hind tibial fringe black; 
tarsi blackish. 
Abdomen blackish, with a median row of gray spots slightly widened at 
posterior margins of tergites, and somewhat larger, oblique, sublateral spots, 
those on second tergite not touching anterior margin; sublateral spots some- 
times tinged with reddish; venter gray, tinged with reddish laterally, darkened 
medianly, the median stripe with black hair. 
Male.—Hye with sparse, short pile, the facets of upper portion much larger 
than those below, but the line of differentiation not distinct; frontal triangle 
brownish, with thin gray pollen; palpus about twice as long as thick, the apex 
truneate. Body coloration essentially as in female. 
Described from a specimen in the United States National Museum 
from Monrovia Canyon, Calif., August 2, 1931, collected by Charles 
H. Martin. 
Cotypes——TIwo females, collection unknown. 
Type locality.—West Fork, Gila River, Ariz. 
MMstribution—Southern California, Arizona, New, Mexico, and 
Colorado. June 28 (Poudre River ‘Canyon, Colo.) to August 2 
(Monrovia Canyon, Calif.). In the United States National Mu- 
seum, four females, one male. 
