146 MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
lobe reddish; scutellum black; hair of thoracic dorsum a mixture of black 
and yellow. Pleura brown, with whitish and black hair; sternum black. Wing 
hyaline, the veins brown; venation normal; costal cell somewhat tinged with 
brown, the vein margins slightly tinged but without distinct spots. Legs dark 
orange brown; base of hind femur and all tarsi darker, but legs not markedly 
bicolored; hind tibial fringe black. 
Abdomen black, with a sublateral row of oblique yellowish spots on a brown- 
ish background and a median row of rather faint triangles composed mostly of 
yellow hair; venter yellowish brown, usually with some black laterally and 
apically. 
Jfale—Eye densely pilose, the facets scarcely differentiated in size; second 
palpal segment dusky orange brown, nearly twice as long as thick, the apex 
blunt. Coloration essentially as in female but femora darker, and black on 
abdomen somewhat less extensive. 
Cotypes.—Females and male, in the collection of Ohio State Uni- 
versity. Three specimens in the United States National Museum are 
probably of the cotype series. , 
Cotype localities—Orono, Maine; Oswego, N. Y.; Springfield, 
Mass.; Canada. 
Distribution.—Wisconsin to Nova Scotia and south to West Vir- 
ginia. June 26 (Ottawa, Ontario) to August 11 (Heartwellville, 
Vt.). In the United States National Museum, 10 females. 
TABANUS HEARLEI Philip 
(Fig. -70, B) 
Tabanus hearlei Philip, Canad. Ent. 68: 150, 1986. 
Rather small, stout; blackish, with three rows of gray spots on abdomen; 
palpus very slender; proboscis unusually long. 
Female—Length 11-12 mm. Eye pilose, deep purple, with four green-blue 
bands. Frons gray tinged with yellowish. about two and one-half times as 
high as wide, with parallel sides: basal callus shiny black, slightly wider than 
high but not touching eyes, median callus tapering. broadly joined to basal callus; 
ocellar tubercle orange brown, distinct: subcallus gray. First antennal seg- 
ment dark gray, with black hair: second dull orange brown, with a distinct 
dorsal process; third dark orange basally, blackened apically, the dorsal angle 
short and blunt and the dorsal excision moderate; annulate portion shorter than 
basal portion. Clypeus and genae gray tinged with yellow, with a mixture of 
black and yellowish hair. Palpus yellowish brown, the first segment darker and 
both segments very slender, with black and yellowish hair. Proboscis very 
elongate, reaching to or beyond apex of fore coxa. 
Thorax black, with mixed black and yellowish hair, the dorsum with five nar- 
row gray stripes. Wing hyaline, costal cell brownish and venation normal 
Legs brownish black, the mid tibia palest. 
Abdomen above black, with three rows of gray triangles, the triangles rarely 
extending to anterior margins of tergites: venter black, with pale-yellowish 
hair. 
Male—Unknown. 
Type.—Female, in the collection of C. B. Philip. Paratype, United 
States National Museum No. 51972; other paratypes in the collec- 
tion of Ohio State University and in the Canadian National Collection. 
Distribution.—British Columbia to Labrador. July 12 (Kettle 
Rapids, near Winnipeg, Manitoba) to July 18 (Birch Island, British 
Columbia). In the United States National Museum, one female. 
TABANUS ASTUTUS Osten Sacken 
(Fig. 70, C) 
Tabanus astutus Osten Sacken, Mem. Boston Soc. Nat. Hist. 2 (pt. 4, No. 4): 
471, 1876; Philip, Canad. Ent. 68: 153-154, 1936. 
Rather small: black, with three rows of prominent gray spots on abdomen; 
prescutal lobe black; palpus slender. 
