After reading Mr. J. W. Tutt's note on page 47 of Can. Ent., I have looked over many of our species of Pieris and Anthocharis with the following result:-Our genus Pieris is probably entirely pure and congeneric with the European. The majority of our species of Anthocharis are congeneric with Euchloë cardamines, as figured by Mr. Tutt, but some species are different and should be removed from the genus. I have not examined seven of the species given in Prof. Smith's list, but those which I have seen separate in synoptic form as follows:-Mr. Tutt's nomenclature of the veins differs from that in use here, as will be seen by a comparison of my figures (Figures 9 and 10) of Anthocharis sara with the figures on page 47 of Can. Ent.