128 MISC. PUBLICATION 305, U. 8S. DEPT. OF AGRICULTURE 
what protuberant; palpus moderately stout. Body coloration essentially as in 
female. 
Type.—Specimen collected between April 27 and May 9, one of 
two female cotypes in the Museum of Comparative Zoology, No. 
14519, herein designated as lectotype. 
Type locality—sSonoma County, Calif. 
Distribution—British Columbia to California and Montana. 
April 12-14 (Cazadero, Calif.) to October (Yellowstone National 
Park, Wyo.). In the United States Naticnal Museum, seven females. 
TABANUS SEQUAX Williston 
(Fig. 60, B) 
Tabanus sequagr Williston, Kans. Acad. Sci. Trans. 10: 137, 1887; Hine, Ohio 
Nat. 5: 248-244, 1904; Rowe and Knowlton, Canad. Ent. 67: 244, 1935. 
Therioplectes leucophorus Bigot, Mem. Soc. Zool. France 5: 640, 1892. 
Tabanus fuscipalpus Bigot, Mem. Soc. Zool. France 5: 681, 1892. 
Medium sized; black; subcallus pollinose; furcation and cross veins mar- 
gined with brown; basal callus higher than wide and not touching eyes. 
Female.—Length 14-17 mm. Eye with dense, short pile. Frons yellowish 
gray, darker at level of median callus, two and one-half to three times as 
high as wide, with parallel sides; hair of frons black, long at vertex; basal 
callus a shiny black triangle, distinctly separated from eyes by a line of 
pollen and tapering to a slender median callus which reaches to vertex; vertex 
with a rather large, somewhat shiny, black spot only slightly swollen and 
with no ocellar tubercle; subcallus yellowish gray, a crescentic depression 
above each antennal pit yellower. Antenna entirely black; first two segments 
with black hair; third rather slender, the dorsal angle not prominent and 
the dorsal excision very shallow; annulate portion about equal in length to 
width of basal portion and about two-thirds length. Clypeus and genae gray, 
with mostly yellowish-white hair, the genae tinged with yellow above near eyes. 
Palpus dark reddish brown or grayish black, of moderate thickness, with black 
hair. 
Thorax black, with faint lines of gray pollen and yellowish hair on dorsum 
in usual pattern; long creamy hair around wing base and on anterior part 
of pleura and sternum, the rest mostly black. Wing hyaline, with dark-brown 
veins and distinct infuscation at cross veins and furcation; venation normal. 
Legs black, the tibiae slightly brownish, with a few white hairs basally. 
Abdomen black, each tergite with a narrow hind border of whitish pollen 
and hair interrupted on each side of the small median triangular expansion 
and somewhat widened laterally; venter with narrow whitish incisures. 
Matle—Unknown. 
Cotypes.—Three females, collection unknown. 
Type locality—Mount Hood, Oreg. 
Distribution—¥rom British Columbia to Oregon and Montana. 
July 10 (Moore’s Lake, Idaho) to August 20 (Glacier, British Co- 
lumbia). In the United States National Museum, 27 females. 
The type of Tabanus fuscipalpis was studied by Hine and, accord- 
ing to his notes, found to be the same as 7’. sequax. 
TABANUS LASIOPHTHALMUS Macquart 
(Fig. 61, 4) 
Tabanus tasiophthalmus Macquart, Dipteéres exotiques nouveaux Ou peti connus, 
vy. 1, pt. 1, pp. 148-144, 1838: Osten Sacken, Mem. Boston Soc. Nat. Hist. 
2 (pt. 4, No. 4): 465-466, 1876; Hine, Ohio State Acad. Sci. Spec. Papers 
5: 51, 19038; U. S. Dept. Agr., Bur. Ent. Tech. Ser. 12: 19-22, 1906; Mc- 
Dunnough, Canad. Ent. 58: 142, 1921: Cameron, Bull. Ent. Research 17: 
31-32, 1926; Philip, Minn. Agr. Expt. Sta. Tech. Bull. 80: 18-25, 108, 1931; 
Schwardt, Ark, Agr, Expt. Sta. Bull, 332; 38-41, 19856. 
