Published online by Cambridge University Press: 31 May 2012
This group includes, besides semivittatus Say, trivittatus Lec., and the recently described castanicolor Fall, two species which have been confused with semivittatus and two others which have been identified as fuscu1us Lec. The species agree well among themselves in body form, type of sculpture, and type of aedfagus, and differ from each other mainly in characters of the antennae and vestiture and in color.
* Contribution from the Division of Systematic Entomology, Entomological Branch, Department of Agriculture, Ottawa.