W. E.  Britton and Viereck, H. L., ?Insects collected from the flowers of fruit trees and plants?, Connecticut Experiment Station Report, vol. 1905, pp. 207-244, 1905.

W. E.  Britton, ?Check-list of the insects of Connecticut?, State of Connecticut. State Geological and Natural History Survey Bulletin, vol. 31, p. 396pp, 1920.