Title: Biblio RTF Export
Author: Biblio 7.x

C. R. Osten Sacken, ?Western Diptera: Descriptions of new genera and species of Diptera from the region west of the Mississippi and especially from California?, Bulletin of the United States Geological and Geographical Survey of the Territories, vol. 3, pp. 189-354, 1877.

C. R. Osten Sacken, ?A list of the North American Syrphidae?, Bulletin of the Buffalo Society of Natural Sciences, vol. 3, pp. 38-71, 1875.

C. R. Osten Sacken, ?On the North American species of the genus Syrphus (in the narrowest sense)?, Proceedings of the Boston Society of Natural History, vol. 18, pp. 135-153, 1875.