importunus Wiedemann, 1828: 127 . Type locality: “ Brazil ”. Distr.: Colombia (Magdalena (Aracataca), Meta (Restrepo; El Caibe), Cordoba (Monteria), Tolima (Venadillo)), Bolivia to Brazil, Guyana, Panama, Paraguay, Peru, Trinidad. Refs.: Bequaert & Renjifo-Salcedo, 1946: 80 ( Tabanus ( Tabanus)); Fairchild, 1971: 95 (cat.); Moucha, 1976: 114 (cat.); Wilkerson, 1979: 376; Fairchild & Burger, 1994: 139 (cat.); Coscaron & Papavero, 2009: 132 (cat.).

monogramma Wiedemann, 1828: 150.

valterii Macquart, 1838b: 184 (1839: 300) .

lividus Walker, 1848: 162 .

albidicollis Macquart, 1850: 336 (1850: 32) .

semisordidus Walker, 1854: 208 .

albicollis Hunter, 1901: 139, error.