HORSEFLIES OF THE SUBFAMILY TABANINAE 85 
Mesoscutum dark brown, with short black hair, the indistinct reddish lines 
with yellowish-brown hair; scutellum black discally, reddish around margin; 
pleura gray, with white hair, the mesopleura with some black hair; patches of 
white hair above wing base. Wing pale brownish, the costal cell darker, 
yellow orange; cell Rs; slightly narrowed apically. Legs generally reddish 
brown, the tarsi blacker; hind tibia darker, the fringe black. 
Figure 32.—Antenna, front view of head, and palpus of Tabanus giganteus. 
Abdomen dark reddish brown to black, with thin gray pollen; a row of 
indistinct gray triangles in well preserved specimens; venter dark reddish to 
black, the tergites each with a narrow hind margin of white pollen laterally. 
Male.—EKye bare, the facets minute, those above only slightly larger, the line 
of differentiation indistinct. Second palpal segment about twice as long as 
wide, oval, truncate at tip, with long black hair. The pale hair of body more 
yellowish than in female. 
Type.—Female, collection unknown. 
Type locality.—Pennsylvania. 
Distribution.—United States from New York to Florida and west 
to Missouri and Oklahoma. July 20 (Beltsville, Md.) to October 8 
(Ozark Beach, Mo.). In the United States National Museum, 33 
females, 3 males. 
The figure of 7’. pallidus Palisot bears a rather close resemblance 
to giganteus and it is probable that they are the same. 
TABANUS GLADIATOR Stone 
(Fig. 33) 
Tabanus gladiator Stone, Ent. Soc. Wash. Proc. 37: 12-18, 1985; Philip, Bull. 
Brooklyn Ent. Soe. 31: 192, 193, 1936. 
FIGURE 33.—Antenna, front view of head, and palpus of Tabanus gladiator. 
Large ; thorax lavender and abdomen orange brown; furcation and cross veins 
margined with brown; frons narrow; palpus very long, straplike, with apex 
truncate. 
