In my paper on “The North American Genera of Anthracina,” which appeared in the last volume of the Can. Entomologist (pp. 157–159), I proposed the nave Velocia for those species of Exoprosopa which have four submarginal cells in each wing. Through the kidness of Dr. Williston, I have been put in possession of a paper by Prof. Camillo Rondani, entitled “Dipterorum Species et Genera Aliqua Exotica.” published in 1863 in the Archivio per la Zoologia, Vol, iii, and on pages 56 and 57 of this paper Prof. Rondani proposes the name Hyperalonia for the above group; this name being the earlier, must supersede the one proposed by me.