Published online by Cambridge University Press: 31 May 2012
In the course of an examination of types and other specimens of Odonata in the Hagen Collection, in the preparation of a synonymic list of the Odonata of the Nearctic Region, I found that Diplax decisa Hagen, 1874, is a synonym of Diplax [Sympetrum] obtrusa Hagen, 1867.
* The study of material in the Hagen Collection was supported, in part, by a Grantn-Aid of Research by the Society of Sigma Xi.
† Currie, 1905, Proc. Ent. Soc. Wash., 7:19.