92 MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
brown to black hair. Second palpal segment of moderate length and thickness, 
dark brown, with black hair. 
Mesoscutum dark reddish brown, with faint pollinose lines. Pleura, sternum, 
and coxae dark, with black hair; no white pile around wing base. Wing pale 
orange brown, infuscated at cross veins and furcation; costal cell and stigma 
darker orange brown. Legs black, the tibiae reddish basally; hind tibial fringe 
prominent, black. 
Abdomen nearly black, with thin grayish pollen above. 
Male.—HKye with areas of large and small facets distinctly differentiated, the 
latter extending around margin of eye to vertex in a narrow band. Coloration 
of body as in female. Clypeus and genae grayer than in nigrescens, which it 
closely resembles. 
FIGURE 38.—Antenna, front view of head, and palpus of Tabanus prowvimus. 
Type—Female, in the British Museum. 
Type ltocality.—¥ lorida. 
Distribution.—Ulinois and Virginia to Oklahoma, Texas, and 
Florida. In the United States National Museum, 12 females, 6 males. 
The type of Zabanus proximus was studied by Hine and found to 
be the same as 7’, benedictus Whitney. 
TABANUS NIGRESCENS Palisot de Beauvois 
(Fig. 39) 
Tabanus nigrescens, Palisot de Beauvois, Insectes recueillis en Afrique et en 
Amerique, p. 100, pl. 2, fig. 2, 1809; Wiedemann, Aussereuropaische zweifliige- 
lige Insekten, v. 1, p. 116, 1828; Osten Sacken, Mem. Boston Soe. Nat. Hist. 
2 (pt. 4, No. 4): 453, 1876; Hart, Ill. State Lab. Nat. Hist. Bull. 4: 238, 
1895. 
FIGURE 89.—Antenna, front view of head, and palpus of Tabanus nigrescens. 
Rather large; black; wing subhyaline to blackish, with spots at furcation and 
cross veins; palpus black; frons with parallel sides. 
Female.—Length 20-24 mm. Eye bare, dark, dull green, with three narrow 
purple bands, the upper one indistinct outwardly. Frons brown, three and one- 
half to four times as high as wide, the sides parallel; basal callus higher than 
