In the February Canadian Entomologist, page 38, Prof. C. F. Baker contributes an article on Ledra perdita, A. and S., in which he attempts to identify the insect described by Amyot and Serville under that name with my Centruchus Liebeckii. Those authors describe their species from an admittedly inaccurate figure, the original type having been destroyed. They state that their species is from Northern America. [See note.] Van Duzee states (fide Baker) that perdita is from Pennsylvania, on what authority I do not know, and Prof. Baker decides that because Van Duzee gives that State as the habitat of the insect, and my species having been described from the same commonwealth, they must be identical. As there is no proof beyond the dictum of Van Duzee that Ledra perdita is from Pennsylvania that point may be dropped until we hear further from him. He is too careful a student of our Homoptera to be guilty of confusing a Membracid with a Ledra.