HORSEFLIES OF THE SUBFAMILY TABANINAB 109 
TABANUS CHELIOPTERUS Rondani 
(Fig. 50, 4) 
? Tabanus cingulatus Macquart, Diptéres exotiques nouveaux ou peu connus, 
v. 1, pt. 1, pp. 144-145, 1838. (Preoccupied by Tabanus cingulatus Thun- 
berg. ) 
Tabanns cheliopterus Rondani, Nuovi Ann. Stor. Bologna (3) 2: 192-1938, 1850; 
Osten Sacken, Smithsn. Mise. Collect. No, 270, p. 228, 1878. 
Tabanus fronto Osten Sacken, Mem. Boston Soc. Nat. Hist. 2 (pt. 4, No. 4): 
431-432, 1876; Hine, La. Agr. Hxpt. Sta. Bull. 93: 48-49, 1907. 
Tabanus subfronto Philip, Jour. Kans, Ent. Soc. 9: 100-101, 19386. (New 
synonymy.) 
Medium sized; orange brown, with a row of yellow median triangles on 
abdomen; fore tibia unicolorous; wings heavily spotted; frons rather broad; 
third antennal segment with a distinct excision. 
ae 
Figure 50.—Antenna, front view of head, and palpus of (A) Jabanus cheliopterus and 
(B) T. recedens, 
Female.—Length 15-20 mm. Eye bare, purplish, with two diagonal green 
bands. Frons grayish yellow, three to three and one-half times as high as wide, 
with parallel sides; basal callus yellowish brown, shiny, flat, slightly higher 
than wide, prolonged in a variable line of same color above; subcallus, eclypeus, 
and genae pale brownish, the clypeus and genae with concolorous hair. Antenna 
entirely orange except extreme apex, which may be black; first and second 
segments with black hair; third moderately wide at base, with a prominent 
dorsal angle and usually a deep dorsal excision. Second palpal segment elon- 
gate, slender, brown, with short black hair. 
Mesoscutum reddish brown, with pale brown lines; scutellum, pleura, sternum, 
and coxae with pale-brown pollen and hair; some black hair on prescutal lobe 
and below it. Wing hyaline, with brown veins, the costal cell, margins of cross 
veins, and fureation strongly tinged with brown, the margins of longitudinal 
veins broadly but more faintly so; cell Rs distinctly narrowed at margin. Legs 
predominantly orange brown, the fore tibia nearly unicolorous; fore femur 
and tarsus sometimes nearly black; hind tibial fringe indistinct, orange brown. 
Abdomen orange brown, the apical segments darker; hind margins of seg- 
ments paler, with a rather uniform row of yellowish triangles, that on second 
tergite, at least, preceded by a dark spot; venter rather uniformly brown, with 
paler hind margins. 
Male—Areas of large and small facets of eye sharply differentiated, the 
small facets occupying lower third and extending along outer margin to vertex. 
Coloration of body essentially as in female. 
Described from specimen collected at New Orleans, La., August 16, 
1913, by J. R. Horton. 
Type.—Female, in the Royal Museum, Turin. 
Type locality —Carolina. 
Distribution—Virginia to Florida and west to Texas. May 18 
(Greenville, Fla.) to September 2 (Mimsville, Ga.). In the United 
States National Museum, 19 females, 1 male. 
Osten Sacken examined the type of cheléopterus Rondani and de- 
clared it to be, apparently, a badly rubbed Zabanus fronto Osten 
Sacken. The writer knows of no other species of this size with the 
