In the Vol. IX of »Notes from the Leyden Museum” (1887, p. 212) M. Fairmaire has honoured my description of a new genus of Bostrychidae (this Journal, Vol. VII, 1885, p. 51) with a short but attractive notice. There is no ground for M. Fairmaire’s assertion that the genus Apoleon Gorham is identical with Dysides Perty. The difference of the countries from which they come, Siam and South America, was alone sufficient to raise this presumption. Nor does it belong to the Ptinides (Anobiidae is what M. Fairmaire intends I presume), nor is there any reason to think Dysides itself does not belong to the Bostrychidae, where Westwood places it.