HORSEFLIES OF THE SUBFAMILY TABANINAE 127 
Mesonotum dark brown, with mixed white and yellowish-brown hair. Pleura, 
sternum, and coxae gray, with white hair. Wing hyaline, veins brown, the costal 
cell and wing base infuscated; venation normal. Legs reddish brown, the fore 
tarsus and apex of fore tibia darker; hair of legs mostly pale, the hind tibial 
fringe distinct, largely black. 
Abdomen above rather broad, dull brownish black, with a median row of 
indistinct triangles and sublateral row of indistinct, reddish, rather large spots; 
hind margins of segments fringed with whitish or yellowish hair, especially 
laterally; venter reddish gray. 
Male.—Eye with very sparse, short pile, the facets of nearly uniform size 
over whole eye; a row of coarse black hair between eyes; frontal triangle gray; 
hair long on first antennal segment above; genae above with black hair. Claws 
of fore tarsus subequal. Rest of coloration similar to that of female but darker, 
the pile of pleura largely black and median abdominal spots very small or 
lacking. 
Cotypes.—Both sexes, in the museum of Jardin des Plantes, Paris. 
Type locality—Carolina. 
Distribution—Oklahoma to Massachusetts and south to North 
Carolina. April 21 (Atoka County, Okla.) to July 27 (Cabin John, 
Md.). Inthe United States National Museum, 66 females, 8 males. 
The type of Z'abanus patulus Walker was studied by Hine, and the 
writer has seen a specimen compared by him with the type, which 
proves to be carolinensis. 7’. carolinensis 1s anomalous because of the 
nearly bare eye in both sexes combined with the ocellar tubercle and 
four-banded eye. The presence of coarse hair between the eyes of 
the male is found in this species and 7. oklahomensis only, but the 
latter have heavily pilose eyes in both sexes. 
TABANUS PROCYON Osten Sacken 
(Fig. 60, 4) 
Tabanus procyon Osten Sacken, U. 8S. Geol. and Geogr. Survey Terr. Bull. 3: 216, 
1877; Hine, Ohio Nat. 5: 241-242, 1904; Philip, Canad. Ent. 68: 1538, 1986. 
Rather small, stout; shiny black; subcallus denuded; palpus black. 
Female.—Length 12-13 mm. Eye with dense pile, dark purple, with four 
green bands. Head generally shiny black, with some gray pollen on frons and 
upper posterior portion of genae. Frons scarcely more than twice as high as 
wide, the sides parallel; basal callus distinctly convex, transverse, about twice 
as broad as high, shiny black; a rounded, black, median callus; ocellar tubercle 
distinct, reddish; subcallus shiny black, somewhat swollen, with a distinct 
median depression. Antenna black; first segment not enlarged above; third 
segment slender, with scarcely any dorsal angle; annulate portion stout, shorter 
than basal portion; hair of genae long, brownish black. Palpus black, the 
second segment stout at base, with long black hair. 
Ficur®h 60.—Antenna, front view of head, and palpus of (4) Tabanus procyon and (B) 
T. sequax. 
Body stout; whole of thorax, abdomen, and legs black, with dark-brown or 
black hair; a few white hairs on last two abdominal segments. Wing hyaline, 
with dark-brown costal cell, the cross veins and furcation margined with brown; 
venation normal. 
Male.—Kye densely pilose, the facets not greatly differentiated in size; first 
two antennal segments with long black hair; frontal triangle shiny black, some- 
