1946] 
Tabanidae of Colombia 
77 
Tabanus Linnaeus 
Key to Subgenera 
1. Abdomen with one, two, or three pale longitudinal stripes 
or rows of contiguous or nearly contiguous spots. 
Wings hyaline or smoky, or faintly clouded along the 
veins. Eyes of female bare, green with two or three 
dark cross-bands in life; of male bare or hairy, with 
or without an area of larger facets. Subgenus Neotabanus. 
Abdomen usually without longitudinal stripes or rows of 
spots; if with rows of spots, the eyes of female un- 
banded or with only one band in life 2 . 
2. Disk of scutellum with a conspicuous spot of black pu- 
bescence, more or less surrounded by a ring of white 
hairs. Eyes of female unbanded. Subgenus Lophotabanus. 
No spot of black pubescence on scutellum; sometimes a 
small prescutellar patch of black hairs 3. 
3. Wings prominently clouded or spotted with brown, sel- 
dom mostly black, as a rule with hyaline areas about 
the cross-veins. Frons usually very narrow, with 
ridge-like callus. Eyes of female unbanded 
Subgenus Philipotabanus. 
Wings hyaline, smoky, entirely black, or spotted at the 
cross-veins; in doubtful cases frons otherwise 4. 
4. Relatively slender species. Third antennal segment not 
crescent-shaped, only slightly angular near the upper 
base. Upper branch of third longitudinal vein with a 
very long appendix Subgenus Macrocormus. 
Stout species. Third antennal segment crescent-shaped, 
with a strong tooth near the upper base. Upper branch 
of third longitudinal vein normally without appendix. 
Subgenus Tabanus , proper. 
*95 a. Tabanus (Neotabanus) lineola var. carneus Bellardi. Syno- 
nyms: Tabanus carneus Bellardi, 1859; Tabanus appendiculatus 
Hine, 1906. 
Amazonas: Caucaya (S. Renjifo) ; Tarapaca (S. Renjifo). 
— Antioquia: near Porcecito, Rio Force (N. Weber); El Dos, 
Turbo (S. Renjifo); Micuro, Rio Leon (S. Renjifo); Puerto 
Berrio (reported by Dunn, 1929). — Atlantico: Puerto Co- 
lombia ( J. Bequaert) ; Calamar (J. Bequaert) ; Barranquilla 
(reported by Krober, 19336); Sabanilla (reported by Krober, 
