Published online by Cambridge University Press: 31 May 2012
Through the courtesy of the authorities of the American Museum of Natural History I have been enabled recently to make slides of the genitalia of a number of Pearsall's types of Eupithecia, contained in their collections, and also to examine slides of type material made by Mr. S. Cassino. The following- new synonymy is based on a careful study of this slide material and a comparison with numerous slides and figures of the genitalia of type material of other authors before me. It continues illy work on this genus contained in several papers published in the Canadian Entonlolcgist in 1929-1932.
* Contribution from the Division of Systematic Entomology, Entomological Branch, Department of Agriculture, Ottawa.