112 MISC. PUBLICATION 305, U. 8S. DEPT. OF AGRICULTURE 
narrow, widened above; annulate portion of third antennal segment shorter 
than basal portion. 
Female.—Length 14-17 mm. Eye bare, dark purple, with two blue-green 
bands. Frons yellowish brown, grayer at vertex, five and one-half to six times 
as high as width at basal callus and widened above; basal callus a rectangle, 
higher than wide and touching eyes; median callus slender, somewhat longer 
than basal callus; subcallus concolorous with frons. First two antennal seg- 
ments reddish brown, with black hair; third entirely black, the basal portion 
slightly longer than broad, with a prominent but obtuse dorsal angle and 
scarcely any dorsal excision; annulate portion shorter than basal portion. 
Clypeus and genae grayish brown, with pale hair. Second palpal segment 
slender but tapering only slightly, light brownish, with short, slightly paler 
hair. 
Mesoscutum brown, with paler pollinose stripes; scutellum tan, with con- 
colorous hair. Pleura, sternum, and coxae grayish brown. Wing nearly hyaline, 
the costal cell yellowish brown; longitudinal veins of fore part of wing weakly 
margined with brown and rather distinct infuscations at furcation and base of 
cell Mi. Legs nearly uniformly reddish brown. 
Abdomen above brown, with a median row of large tan triangles arising 
from posterior bands, which widen laterally nearly to form sublateral triangles; 
venter uniformly light brown. 
Male——Unknown. 
Type.—Female, United States National Museum No. 50615. 
Type locality—Immokalee, Fla. 
Distribution—Georgia to Florida. April 28 (Monticello, Fla.) 
to June 16 (Immokalee, Fla.). In the United States National Mu- 
seum, 13 females. 
TABANUS TURBIDUS Weidemann 
(Fig. 52) 
Tabanus turbidus Wiedemann, Aussereuropaische zweifitigelige Insekten, v. 1, 
pp. 124-125, 1828; Osten Sacken, Mem. Boston Soc. Nat. Hist. 2 (pt. 4, 
No. 4): 480-481, 1876; Smithsn. Misc. Collect. No. 270, p. 228, 1878; 
Philip, Bull. Brooklyn Ent. Soc. 31: 195, 1986. - 
? Tabanus fusconervosus Macquart, Diptéres exotiques nouveaux ov peu connus, 
v. 1, pt. 1, p. 147, 18388. 
Ficurb 52.—Antenna, front view of head, and palpus of Tabanus turbidus. 
Rather large; brown, with an indistinct median row of pale triangles on 
abdomen; wing veins more or less margined with brown and a spot at furca- 
tion; fore and hind tibiae uniformly brownish, with brown hair; antenna 
entirely reddish brown; frons very narrow and widened above; cell Rs wide 
open. 
Female.—Length 20-22 mm. Eye bare, purple, with two green stripes. Frons 
brown, darker in region of median callus, about six times as high as width at 
base, distinctly widened above; basal and median calli reddish brown, the two 
forming a denuded stripe reaching two-thirds to three-fourths length of frons, 
and equal in width to narrowest part of front, except slightly below middle, 
where it is constricted; subcallus brown, the clypeus and genae slightly paler, 
with orange-brown hair. Antenna uniformly orange brown; first segment dis- 
tinctly widened apically; second with a slender dorsal process: both with con- 
