THE CANADIAN ENTOMOLOGIST. 47 



his types are in very bad condition ; and sometimes the condition of the 

 specimen is taken as a specific character. The same species is described 

 in the same drawer several times over. It is absolutely impossible to find 

 out what principle has guided Mr. Walker in his work. If the species 

 had been sorted out just as they came along, and then described, I do 

 not sincerely think the eftect would have been much worse ; provided the 

 material had previously been sorted into families. And yet, even here, 

 there are a large number of mistakes. There are plenty of BomhycidcB 

 and Noctuidce among his Geometridce. For twenty-five years Mr. Walker's 

 work has been a real obstacle in the way of American Entoiiiologists. 

 Through my different visits a certain number of his species have been 

 made known ; but it is impossible for a private person, with my means, to 

 finish this work. Every day that the British Museum allows Mr. Walker's 

 work, which it published and paid for, to remain uncorrected, it continues 

 to inflict as much injury upon the progress of this branch of science as it 

 is possible to do. 



I take this opportunity to thank Mr. Butler for his very kind and wel- 

 come assistance in the preparation of my Essay on the North American 

 Noctuidge, which is being printed in London. " 



NOTE ON CATOCALA WALSHII. 



BY A. R. GROTE. | 



After a comparison of my types with Mr. Walker's, Mr. A. G. Butler 

 writes me that Walshii Ediv., as taken by Prof Snow in Kansas, is the 

 same as yicndura of Walker. The form which has been taken about 

 Albany and which is exactly like Unijuga, but differs by the band being a 

 little narrower on hind wings and not quite so continuous, is an unnamed 

 variety of Unijuga. It follows, from this that my Arizonce is certainly not 

 Walshii, as suggested by certain parties. Mr. Neumoegen has received 

 it in quantity from Arizona. The form taken by Belfrage in Texas, and 

 distributed as Walshii, may be the same as Ai'izonm, and should be care- 

 fully compared with Arizonian specimens. In any case it becomes now 

 additionally probable that my suggestion that Aspasia is a re-description 

 of ArizoficB is correct, and if any one will take the trouble to compare the 

 descriptions the reasonableness of my suggestion will become apparent. 

 On account of the pinkish or red hind wings and the brown primaries, 

 both species were naturally compared with amatrix. The amount of 

 variation in color of hind wings in this genus is not yet ascertained. 



