Tabanus unistriatus Hine

(Figures 27 A–E, 28A–D 34)

Tabanus unistriatus Hine, 1906: 28, 1925: 28 (taxonomy); Kröber, 1933: 365 (taxonomy), 1934: 294 (cat.); Fairchild, 1942b: 162, pl. l, fig. 2 (taxonomy); Woke, 1947: 369 (Nicaragua spp.); Fairchild, 1947: 575 (Panama spp.); Fairchild, 1961: 31 (Costa Rica spp.); Lee et al., 1969: 455 (Colombia spp.); Fairchild, 1971: 104 (cat.); Hogue & Fairchild, 1974: 26 (Costa Rica spp.); Fairchild, 1976: 260, fig. 15 (rev.); Moucha, 1976: 149 (cat.); Wilkerson, 1979: 391 (Colombia spp.); Fairchild, 1986: 128 (Panama spp.); Henriques & Gorayeb, 1993: 19 (MPEG spp.); Fairchild & Burger, 1994: 152 (cat.); Coscarón & Papavero, 2009: 145 (cat.); Cárdenas et al., 2009: 528 and appendix 4: 21 (Ecuador spp., in part); Wolff & Miranda- Esquivel, 2016: 287 (cat., in part); Henriques, 2016: 184 (AMNH spp.).

Diagnosis. Antenna orange, the style black. Wings lightly to strongly infuscated. Costal cell yellow. Abdominal median stripe a series of connected triangles through tergite 6, slightly broader at tergites 1–4, tapered in the remainder, dorsolaterals absent or very weak.

Comments. According to Fairchild (1976) this species is very similar to T. argentivittatus, differing from the latter just by its smaller size and occurring only west of Andes and by the morphology of the male: eyes nearly as long as wide, antennal style black, pruinescent subcallus. (Figs. 6C, 27C).

The species distribution ranges from Guatemala to Ecuador west of Andes to Ecuador west of Andes. The Guiana record from Barretto (1957) remains to be confirmed. Wolff & Miranda-Esquivel (2016) record this species to Caquetá, Colombia based on an unpublished report, however, no illustrations or discussion about the species are provided in this work and the identity of the specimens need to be confirmed.

Material examined. PANAMA, Almirante, VIII-21-44 (♀, FSCA) ; Bocas del Toro, Rio Changena, 2400 ft (♂ FSCA) . ECUADOR, Esmeraldas, Kumanii Lodge (♀ INPA) .