H. LOEW AND C. R. OSTEN-SACKEN.--Monographs of the Diptera of North
America. (Smithsonian Miscellaneous Collections.) 4 parts. Washington,
Smithsonian Institution, 1862-'72.
The several monographs will be found enumerated under the
respective families.
H. LOEW.--Diptera Americae septentrionalis indigena. 2 parts. Berlin,
1861-'72. (Originally published in 10 centuriae in the Berliner Entomol.
Zeitschrift.)
Descriptions of 1,000 North American Diptera, but without synoptic
arrangement.
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. <Bull. U. S. Geolog. and Geogr. Survey of
the Territories, Vol. III, 1877, pp. 189-354.
F. BRAUER.--Die Zweifluegler des Kaiserlichen Museums zu Wien. I-III.
Wien, 1880-'83.
Important contributions to the classification of the Diptera.