Published online by Cambridge University Press: 31 May 2012
Since the publication of my revision of the North American species of this genus, the food-plants of the larvae of several species, at the time unknown, have been ascertained. The recording of these, together with a few other notes that have been made from time to time in the course of identification work, form the basis of the present paper.
* Contribution from the Division of Entomology (Systematic Entomology), Department of Agriculture, Ottawa.