C. W.  Johnson, ?Diptera of New Jersey?, Annual report of the New Jersey State Museum, vol. 1909(1910), pp. 703-814, 1910.

O. A.  Johannsen, ?Order Diptera?, in List of the insects of New York with a list of the spiders and certain other allied groups, M. D.  Leonard, Ed. 1928, pp. 687-869.