Proceedings of the United States National Museum
Many of the species herein described were received from the Bureau of Entomology, United States Department of Agriculture, having been reared by its various branches in economic investigations as parasites of injurious insects. In this connection attention is especially called to the interesting and varied series reared from Agromyza. In this paper, as in all previous papers published by me, the sex first described is to be taken as the true type and the second as the allotype.
Crawford, J. C., "Descriptions of New Hymenoptera No. 5" (1912). Co. Paper 168.