126 MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
Thorax and legs dark brown to black, with concolorous hair, the humeral and 
prescutal lobes usually lighter. Wing smoky brown, the vein margins darker 
than discal part of cells. 
Abdominal segments 1-8 yellow orange; on tergites 1 and 2 an indistinctly 
margined black triangle, its base under scutellum and its apex usually ending 
on tergite 2, but sometimes reaching onto or across tergite 3; a dark line along 
extreme lateral margin of these segments; segments 4-7 entirely black dorsally, 
but sternite 4 often with considerable orange. 
Male—kEye with dense, short pile. Head not enlarged, the line of differen- 
tiation between the areas of large and small facets imperceptible. Coloration 
of body as in female. 
Type.—Collection unknown. 
Type locality —Virginia. 
Distribution.—Manitoba and Colorado to Maine and south to 
Georgia in Atlantic States. June 19 (Aweme, Manitoba) to August 
11 (Salisbury Cave, Maine). In the United States National Museum, 
11 females, 9 males. 
FIGURE 59.—Antenna, front view of head, and palpus of (4) Tabanus cinctus and (B) 
T. carolinensis. 
This striking species is the type of the genus Dasyommia Enderlein. 
Although the eye of the female is bare or nearly so, and the ocellilike 
protuberances are more pronounced than usual, it does not seem that 
these characters are sufficient to warrant considering it as more than 
an unusual 7'abanus, 
TABANUS CAROLINENSIS Macquart 
(Fig. 59, B) 
Tabanus carolinensis Macquart, Diptéres exotiques nouveaux ou peu connus, 
v. 1, pt. 1, p. 145, 1838; Hine, Ohio State Acad. Sci. Spec. Papers 5:49, 1903. 
Tabanus patulus Walker, List of the Specimens of Dipterous Insects in the Col- 
lection of the British Museum, pt. 1, p. 175, 1848. 
Rather small but stout; dull brown, with three rows of faint abdominal spots, 
the lateral spots rather large; subcallus shiny. 
Female.—Length 12-15 mm. Eye with very sparse, short pile, deep purple, 
with four green-blue bands. Frons about three times as high as wide, nearly 
parallel sided, the pollinose areas yellowish gray, denuded areas chestnut brown; 
basal callus usually slightly broader than high, touching eye margins, rounded 
above, with suture Separating it from subecallus distinctly curved downward 
medianly ; median callus usually separated from basal callus, a rectangle, higher 
than wide and consisting of a median raised line bordered by a dull-brown area, 
the whole narrower than frons; denuded area at vertex triangular, the apex 
sometimes joined to median spot; ocellar tubercle rather large but not Sharply 
defined; subcallus completely denuded, shiny, rather convex, darker laterally. 
Antenna orange, the annulate portion black; first two segments with black 
hair, the dorsal process of second prominent; basal portion of third rather 
slender, dorsal angle distinct but rather short and dorsal surface of segment 
beyond base of process nearly straight; annulate portion equal in length to 
width of basal portion. Clypeus and genae light gray, with white hair. Second 
palpal segment short and stout, tapering apically, pale yellowish or brownish, 
with white hair and often scattered black hair apically. 
