100 MISC. PUBLICATION 305, U. 8S. DEPT. OF AGRICULTURE 
mostly black. Wing with costal cell strongly yellow and anterior longitudinal 
veins, cross veins, and furcation faintly margined with yellow not forming 
distinct spots; cell Rs somewhat narrowed apically. Legs entirely dark, the 
tibiae tinged with orange brown; hind tibial fringe distinct, black. 
Abdomen above nearly black, with a single row of median white triangles 
starting aS a very smail spot on second tergite; those on third and fourth 
usually somewhat larger, but rarely attaining anterior margin of segments; 
venter gray, with a wide, median, dark-brown stripe, not so well defined as in 
trimaculatus. 
Male—Areas of large and small facets of eye sharply differentiated, the 
former extensive but separated from hind margin of eye by a narrow band of 
small facets; area of large facets, in dried specimens, usually yellow, with a 
broad dark band across them. Clypeus and genae orange brown, with brown 
hair. Thorax darker than in female, with no white hair. Venter of abdomen 
black, with grayish incisures. 
Type—Female, no longer in existence. 
Type locality —Milford, N. H. 
Distribution—New Hampshire to North Carolina and west to 
Ohio. May 5 (Allegheny, Pa.) to August 20 (Wilton, N. H.). In the 
United States National Museum, 10 females, 3 males. 
TABANUS COFFEATUS Macquart 
(Fig. 45, AY 
? Tabanus nigripes Wiedemann, Diptera Exotica, pt. 1, p. 75, 1821. 
Tabanus coffeatus Macquart, Dipteres exotiques nouveaux ou peu connus, sup. 
2, pp. 389-40, 1847; Osten Sacken, Mem. Boston Soc. Nat. Hist. 2 (pt. 4. 
No. 4) : 441-442. 1876: Hine, Ohio Nat. 5: 235, 1904; Hine, La. Agr. Expt. 
Sta. Bull. 93: 46, 1907; Schwardt, Ark. Agr. Expt. Sta. Bull. 332: 35, 1936. 
FIGURE 45.—Antenna, front view of head, and palpus of (4) Tabanus coffeatus and 
(B) T. rufofrater. 
Rather small; brownish black, with a single median row of triangles on 
abdomen arising from pale posterior bands; wing hyaline; fore tibia with a 
few white hairs at base but not distinctly bicolored. 
Female—Length 11-13 mm. Eye bare, uniformly dark. Frons about four 
and one-half times as high as width at base, slightly widened to upper third, 
gray, With brown at vertex and middle; hair on brown portions black, on gray 
portions white; basal callus a yellowish-brown to black rectangle higher than 
wide and touching eyes; median callus a slender, concolorous line, joined to 
basal callus and of about equal length; subcallus somewhat convex, usually 
partially denuded and concolorous with basal callus, the pollen which is present, 
and which may cover whole subcallus, yellowish brown. Antenna dark orange 
brown to entirely black, the extreme base of third segment usually somewhat 
lighter than rest; first two Segments with black hair, basal portion of third 
stout, the dorsal angle prominent, dorsal excision usually very shallow; annu- 
late portion about equal in length to width of basal portion. Clypeus, and 
genae below antenna, white, with white hair. Second palpal segment moderate 
in length, slightly swollen at base, pale yellow or yellowish brown, with a 
mixture of short black and white hair. 
Mesonotum reddish brown to nearly black, with four rather broad gray stripes, 
the median stripes going around the scutellum: prescutal lobe usually reddish 
brown, a fringe of black hair along lower margin. Pleura, sternum, and coxae 
gray, with whitish hair. Wing hyaline, with brown veins and yellow stigma; 
sometimes a very faint cloud at furcation and base of cell M:; cell R; only very 
