In the course of my studies of the Eucosmids of Nova Scotia I find that there are several species in the spiraeifoliana group which, while very similar in general appearance and maculation, can be readily separated on characters found in the female genitalia and to a lesser extent also in those of the male. Mr. C. Heinrich in his Monograph has figured the female genitalia of spiraeifoliana Heinr. and aemulana Heinr. and these figures, while rather reduced in size, are quite recognizable. Both species occur in southwestern Nova Scotia and along with them are two other species, apparently undescribed. I offer descriptions of these, together with figures of the female genital plates of all four species for the sake of comparison.