98 MISC. PUBLICATION 305, U. 8S. DEPT. OF AGRICULTURE 
Female.—Length 14-21 mm. Eye bare, purple, with two narrow green-hlue 
bands. Frons grayish or orange brown, slightly over four times as high as 
width at base and only slightly widened above; basal callus chestnut brown, 
higher than wide, touching eyes and narrowed above; median callus of same 
color, about one-third as wide as basal callus, of about same length and more or 
less narrowly joined to it; subcallus yellowish brown or grayish. First two 
antennal segments orange brown, with black hair; third dark orange brown to 
black, the basal portion with a pronounced dorsal angle and rather shallow 
excision; annulate portion usually slightly shorter than basal portion. Clypeus 
and genae gray, with whitish hair, to brown, with brownish-black hair. Second 
palpal segment moderate in length and thickness, brownish, with short black hair. 
Mesoscutum brownish, with distinct whitish lines in usual pattern; scutellum 
with white pollen and pile. Pleura, sternum, and coxae gray, with whitish 
hair, to brown, with brownish-black hair. Wing subhyaline, the costal cell 
brown, and furcation and cross veins very faintly margined with brown; vena- 
tion normal. Legs nearly uniformly brown in ground color, with mostly black 
hair in darker specimens, but with dense, creamy-white hair on middle and hind 
tibiae and some on base of fore tibia in lighter specimens. 
Abdomen above deep orange brown, with a median row of whitish Pres 
consisting of a Small one on posterior margin of second tergite, broad ones, 
sometimes reaching anterior margin, on tergites 3-4, and smaller ones poste- 
riorly; hind margins of tergites usually with narrow whitish bands, expanding 
laterally; venter grayish brown, the sternites with paler bands apically. 
Mate.—Areas of large and small facets of eye distinctly differentiated. Sec- 
ond palpal segment about twice as long as thick, with a small decurved apex. 
Thorax dark brown, with dark hair, the scutellum pale as in female and the 
dorsal stripes not so pronounced. Legs blacker. Pale bands of hind margins 
of tergites usually much broader than in female, sometimes nearly as wide as 
length of median triangles and therefore obliterating them. 
Type.—Female, lost. 
Type locality —Missouri. 
Distribution—Maryland to Florida and west to Oklahoma and 
Texas. May 5 (Wakulla County, Fla.) to August 24 (Natural 
Bridge, Ty In the United States National Museum, 63 females, 
5 males. 
The variation in the color of the pollen and hair of the pleura 
and head is unusual, but no structural, seasonal, or geographical 
differences could be discovered to separate the two forms, and they 
intergrade in color. Hine examined the type of tenessensis (sic) 
Bigot and, according to his manuscript notes, he found it to be in 
poor condition but unmistakably the same as ‘molestus. The writer 
has seen a specimen compared by Hine with Bigot’s type. 
TABANUS MODERATOR, new species 
(Fig. 44, A) 
Rather large; dark brown, with white scutellum, a row of large white spots 
cn abdomen, that on tergite 2 distinctly smaller than those on 3 and 4; veins 
Reis and Rs margined with brown; frons very narrow, widened above. 
Female.—Length 19-20 mm. Eye bare, purple, with two green-blue bands. 
Frons gray tinged with yellow brown at level of median callus, about nine times 
as high as width at base, distinctly widened above; basal callus orange brown, 
about two and one-half times as high as wide, narrowed above; median eallus 
a narrow concolorous stripe, somewhat longer than basal callus and narrowly 
joined to it; subcallus and top of genae yellowish brown. Antenna black, the 
first two segments with black hair; third with a prominent, acute, dorsal angle 
and a pronounced excision; annulate portion about as long as width of basal 
portion. Clypeus and lower genae white, with white hair. Palpus yellowish 
brown, the second segment moderate in length and thickness, with mixed black 
and pale-yellowish hair. 
Mesoscutum dark brown, with five distinct, yellowish-gray stripes, the median 
one very slender, sublateral ones broader, fading somewhat posteriorly, and 
