102 MISC. PUBLICATION 305, U. 8S. DEPT. OF AGRICULTURE 
Male.—Strikingly different from female because of the nearly black thorax 
and mostly pale abdomen. Areas of large and small facets of eye distinctly 
differentiated, the former extensive and not greatly enlarged; hair of genae 
mostly black; palpus dark orange brown, with black hair, the apex acute and 
slightly decurved. Thorax dark brown, with black hair except for white hair 
around margin of scutellum; wing as in female; legs mostly dark, with black 
hair, but some white hair at apices of middle and hind femora and on hind 
tibia. Second tergite with anterior half medianly dark brown, with black 
hair, posterior half medianly, and even more laterally, pinkish, with white hair; 
on tergites 3-6 the paler color covering most of surface, leaving very little of 
the darker color anteriorly; venter mostly yellowish or reddish, with white 
hair, the first and second sternites somewhat darkened at least medianly and 
very narrow, dark, anterior bands beyond this. 
Described from a specimen. collected at Monticello, Fla., April 16, 
1935, by'G. B. Fairchild. 
Type.—Female, in the British Museum. 
Type locality.—Georgia. 
Distribution —Georgia, Florida, and Mississippi. April 16 (Mon- 
ticello, Fla.) to June 23 (Mimsville, Ga.). In the United States 
- National Museum, 18 females, 2 males. 
Osten Sacken examined the type of Tabanus unicolor Macquart in 
Bigot’s collection and declared it to be an unrecognizable species. 
perhaps 7’. tener. ‘The name being preoccupied, Rondani proposed 
the new name 7’. lateritzus. The type of 7. rufofrater was studied 
by Hine and was found to be the same as 7. tener Osten Sacken. 
TABANUS CATENATUS Walker 
(Fig. 46) 
Tabanus catenatus Walker, List of the Specimens of Dipterous Insects in the 
Collection of the British Museum, pt. 1, p. 148, 1848; Osten Sacken, 
Smithsn. Mise. Collect. No. 270, p. 227, 1878. 
Tabanus orion Osten Sacken, Mem. Boston Soc. Nat. Hist. 2 (pt. 4, No. 4): 
442-448, 1876; Philip, Minn. Agr. Expt. Sta. Tech. Bull. 80: 113, 1981. 
FIGURE 46.—Antenna, front view of head, and palpus of Tabanus catenatus. 
Large; brown, with a median row of narrow white triangles on abdomen; 
wing brownish but no distinct spot at furcation; fore til a uniformly brown; 
third antennal segment largely black; cell Rs; wide open. 
Female——Length 22-25 mm. Eye bare. Frons yellowish gray; about four 
and one-half times as high as width at base, very slightly widened above; 
basal callus chestnut brown, as wide below as frons, vertical, tapering to a 
slender median callus of same color, the two combined reaching about two- 
thirds length of frons; subcallus flat, yellowish gray. Antenna reddish, the 
third segment black beyond dorsal angle; first two segments with short black 
hair and a few short hairs at ventral angle of third segment; basal portion 
of third rather slender, with a distinct dorsal angle and excision; annulate 
portion about two-thirds length of basal portion. Clypeus and genae reddish, 
with gray pollen and white hair. Second palpal segment moderately long and 
