This paper is not by any means intended to be a full treatment of the species of the genus Apantesis, occurring in Canada. There is so much yet to be learned about many of the forms that the preparation of such an article is still quite impossible. The intention, therefore, is merely to present the rather incomplete notes we have made at Ottawa, with the hope that they may be of some use to students who are, or who may become, interested in these insects, and also that it may be seen at a glance what work has been done on some of the species, as well as what is still lacking with regard to others. There is considerable doubt as to the validity of some of the species of this genus, and these doubts as to the validity of some of the species of this genus, and these doubts can only be dispelled by careful and extensive breeding from the egg, taking accurate notes of the larvæ (in their different stages), the pupæ, etc. Large series of many of the so-called species will have to be bred before definite knowledge can be acquired.