First issued in release COL21.6.
Last used in release COL22.4
Published in
Cresson, E. T., Jr. 1918. Costa Rican Diptera collected by Philip P. Calvert, Ph. D., 1909-1910. Paper III. A report on the Ephydridae. Transactions of the American Entomological Society 44: 39-68, 1 pl. [1918.04.04]