166 MISC. PUBLICATION 305, U. S. DEPT. OF AGRICULTURE 
Tabanus leucomelas Walker, List of the Specimens of Dipterous Insects in the 
Collection of the British Museum, pt. 1, p. 175, 1848; Osten Sacken, Mem. 
Boston Soc. Nat. Hist. 2 (pt. 4, No. 4): 474, 1876; Philip, Canad. Ent. 68: 
156, 1986. 
Type—A female in the British Museum. 
Type locality—Georgia. 
Not recognizable from the original description. 
Tabanus lineola Palisot de Beauvois, Insectes recueillis en Afrique et en 
Amerique, p. 101, pl. 2, fig. 6, 1805. (Preoccupied by Zabanas lineola Fab- 
ricius, 1794.) 
Type.—Female, collection unknown. 
Type locality—Unknown. 
There is no indication in the original reference that Palisot de 
Beauvois was redescribing 7’. lineola Fabricius. It is probably a. 
species near Jongus Osten Sacken, but the description and figure are 
not sufficient to make determination possible. 
Tabanus marginalis Fabricius, Systema Antliatorum, pp. 99-100, 1805; Wiede- 
mann (? not Fabricius), Aussereuropaische zweifliigelige Insekten, v. 1, 
pp. 166-167, 1828; Osten Sacken, Mem. Boston Soc. Nat. Hist. 2 (pt. 4, No. 
4): 472, 1876. 
Type.—Female, probably no longer in existence. 
Type locality —North America. 
The original description is too meager to permit determination, 
and there is some question as to whether Wiedemann’s description 
applies to the same species. Osten Sacken suggested that marginalis 
was Close to his 7. vivax, but Wiedemann’s description more nearly 
applies to fairchildi Stone or perhaps nivosus Osten Sacken. 
Tabanus nebulosus Palisot de Beauvois, Insectes recueillis en Afrique et en 
Amerique, p. 222, pl. 3, figs. 4-5, 1813-20. (Preoccupied by Tabanus 
nebulosus Degeer, 1776.) 
Cotypes.—Two females, collection unknown. 
Cotype locality —United States. 
Palisot de Beauvois figured two females, with little doubt repre- 
senting two species, neither of which can be surely recognized. 
Tabanus novae-scotiae Macquart, Diptéres exotiques nouveaux ou peu connus, 
te 2, p. 40, 1847; Osten Sacken, Smithsn. Misc. Collect. No. 270, p. 61, 
Type—Female, originally in the Bigot collection, perhaps now in 
the British Museum, 
Type locality.—Nova Scotia. 
Not recognizable from the original description. Osten Sacken ex- 
amined the type and wrote that it was not unlike a small Zabanus 
actaeon Osten Sacken, but that the abdominal triangles have a golden- 
yellow pubescence. 
Tabanus pubescens Macquart, Diptéres exotiques nouveaux ou peu connus, 
sup. 2, p. 20, 1847. 
Chelommia ? pubescens Kréber, Rev. Ent. 4: 271, 1984. 
Type.—Female, originally in the Bigot collection, perhaps now 
in the British Museum. 
Type locality America. 
Not recognizable from the original description. Kroéber suggests 
that it is South American, perhaps belonging in the genus Chelom- 
mia Enderlein. 
