HORSEFLIES OF THE SUBFAMILY TABANINAE O1 
TABANUS WIEDEMANNI Osten Sacken 
(Fig. 37, B) 
? Tabanus palpinus Palisot de Beauvois, Insectes recueillis en Afrique et en 
Amerique, p. 221, pl. 3, fig. 1, 1813-20. 
Tabanus ater Wiedemann (not Palisot de Beauvois), Aussereuropaische 
zweifliigelige Insekten, v. 1, pp. 136-1387, 1828. 
Tabanus wiedemanni Osten Sacken, Mem. Boston Soc. Nat. Hist. 2 (pt. 4, No. 
4, and sup.) : 455-456, 559, 1876-78. 
Medium sized; black; wing dark, with rather distinct spot at furcation; 
basal callus subquadrate; median callus joined to it by its entire width; nar- 
row portion of third antennal segment not remarkably elongate. 
Female.—Length 17-20 mm. Hye bare. Frons grayish brown, three times 
as high as wide, with parallel sides; basal callus subquadrate, protuberant, dark 
shiny brown; median callus below as wide as basal callus, reaching to upper 
third of frons and not raised; vertex somewhat denuded; subcallus denuded, 
shiny brown, protuberant. Antenna biack, the extreme base of third segment 
often orange brown; third segment with a prominent dorsal angle and deep 
excision and a distinct angle on ventral margin; annulate portion about equal 
in length to widest part of basal portion or two-thirds of basal portion. Clypeus 
and genae with brown polien except just below antennae and margining clefts 
to clypeal pits; hair of clypeus black. Second palpal segment black, with black 
hair, moderate in length and thickness. 
Whole body dark brownish black. Legs black. Wing dark brown, slightly 
paler posteriorly, the furcation and cross veins not distinctly spotted; venation 
normal, 
Male.—Unknown. 
Type.—Female, Museum of Comparative Zoology No. 4045. 
Type locality.—"Enterprise, Fla. 
Distribution.—North Carolina to Florida. March 24 (Indian- 
town, Fla.) to August 13 (Paradise Key, Fla.). In United States 
National Museum, 23 females. 
Tabanus palpinus was described from what is obviously a male 
Tabanus, as is indicated by the structure of the palpus. Accord- 
ing to the description and figure, however, there was considerable 
space between the eyes, an unusual condition i in Tabanidae. It would 
seem quite probable that palpinus Palisot is wiedemanni Osten 
Sacken, but until the male of the latter is discovered, or the type of 
palpinus can be studied, the name wiedemanni should be retained. 
TABANUS PROXIMUS Waiker 
(Fig. 38) 
Tabanus provimus Walker, List of the Specimens of Dipterous Insects in the 
Collection of the British Museum, pt. 1, p. 147, 1848; Philip, Bull. Brook- 
lyn Ent. Soc. 31: 193-194, 1936. 
Tabanus benedictus Whitney, Canad. Ent. 36: 206, 1904; Hine, Ohio Nat. 
5: 285, 1904; La. Agr. Expt. Sta. Bull. 98: 45-46, 1907; Bequaert, Boston 
Soc. Nat. Hist. Occas. Papers 8: 85, 1933; Schwardt, Ark. Agft. Expt. Sta. 
Bull. 3382: 33-84, 1986. (New synonymy.) 
Large; dark brown; abdomen unicolorous; palpus dark brown; antenna 
orange; brown spot on wing at furcation; frons narrow, with sides divergent 
above. 
Female—Length 25-27 mm. Hye bare. Frons yellowish gray, about six 
times as high as width at base, widened above; basal callus reddish brown, 
narrower than frons, higher than wide, with a spindle-shaped line above be- 
coming very narrow and reaching nearly to vertex; vertex grayish, with black 
hair; subeallus reddish brown, with yellowish pollen, often partially denuded. 
Antenna orange, first two segments with black hair; third with a prominent 
dorsal angle and deep dorsal excision; annulate portion shorter than width 
of basal portion. Clypeus and genae gray tinged with yellow, with orange- 
