H.  Loew, ?Diptera Americae septentrionalis indigena. Centuria tertia?, Berliner Entomologische Zeitschrift, vol. 7, pp. 1-55, 1863.

H.  Loew, ?Diptera Americae septentrionalis indigena. Centuria decima?, Berliner Entomologische Zeitschrift, vol. 16, pp. 49-124, 1872.