THE CANADIAN ENTOMOLOGIST. 243 



identified by me, nor did I ever determine this species as spinigera, 

 so that the reference (I. c. 167) to my ''lists and collection" is erroneous. 

 I named originally xyliniformis for Prof. Riley, who published it in the 

 Missouri Reports. 



A. impressa, Wlk. 



I had previously, after seeing types, considered impressa, fasciata and 

 Verrilli as referring to one identical species. I did not, however, 

 originally determine this species as brumosa. I took the, as it 

 now appears, erroneous identification from Mr. Morrison, to whom it 

 should be credited. I only knew brumosa from Guenee's description, 

 which I could not myself identify. Mr. Walker's descriptions were quite 

 unintelligible to me, and there was no guarantee that they referred 

 positively to species of Acrouycta at all. 



A. brumosa, Guen. 



After referring my subochrca to this, the name, following Mr. Butler, 

 is now identified with persuasa. It has always seemed improbable to me 

 that this latter Southern species should have been intended by Guene'e, 

 and I should not drop a well-founded name on the chance. Probably 

 when Guenee's types, Coll. Oberthur, are examined, these names may be 

 changed back again, and I should advise students to retain persuasa. 

 Later on, in the same paragraph, the author says that Mr. Butler " was 

 correct in uniting brumosa and superans." If so, Mr. Butler must have 

 made another mistake. Indeed, it cannot well be that brumosa is both 

 persuasa and superans. What brumosa really is, is hardly settled by the 

 specimen in Brit. Mus. Guene'e told me in 1S67 that he had many 

 of his types, and showed me several in separate glass boxes, comparing 

 them with what specimens of Acronycta I had brought with me to 

 Chateaudun. Guenee stated at the same time that he had returned other 

 specimens (in some cases the cotypes, as I understood) to Doubleday. 

 Guene'e's specimens, Coll. Oberthur, must be gone over before his names 

 in this genus can be finally decided upon. 



A. subochrca, Grote. 



This name is now validated, as I contended it should be. 



A. impleta, Wlk. 



I have not the Brit. Mus. Cat. at the moment to again refer to, but 

 I believe this name was founded upon a fragment, hind wings and body 



