As I was sitting in Victoria Park, London, Ont., on one of the early days of August, 1902, a sharp click on my straw hat indicated to me that a beetle had been suddenly arrested in its erratic flight. I took off my hat and found thereon a longhorn, with the familiar outline and ornamentation of the Clytus group. But there was something about it that seemed unusual to me, and the more I looked at it the more I was convinced of its novelty. So I secured it, killed and mounted it, and, as opportunity presented itself, endeavoured to determine it, but could find nothing with which it would correspond, and the books afforded me no relief. Having occasion to require the assistance of Mr. W. H. Harrington, Ottawa, upon some B.C. beetles, I sent my unique in order to secure his verdict upon it.