132 THE CANADIAN ENTOMOLOGIST, 



As soon as the first specimens were dry, I sent examples to Prof. 

 Kiley. who determined them as Attacus cinctus Tepper. first described and 

 figured in the " Bulletin of the Brooklyn Entomological Society for 

 January, 1883." 



One fact in connection with these specimens struck me as singular, 

 viz., that not one of my thirty or more pupas were parasitized. With us 

 so large a proportion of Bombycid pupae, under natural conditions, are 

 destroyed by Ichneumonidce and by Chalcis and Tachina flies, that I con- 

 fidently expected to get something new in this line also. 



Mr. Tepper's types were collected in Southern Arizona, but he does 

 not tell us the species of tree on which they were found. Neither was 

 Mr. Mendenhall quite certain that he had been correctly informed con- 

 cerning the Mexican tree from which he made his collection. Conse- 

 quently the food plants and larval history of this magnificent species still 

 remain to be investigated by some entomological explorer in southern 

 latitudes. 



CITHERONIA REGALIS, Hubner. 



BY FREDERICK CLARKSON, NEW YORK CITY. 



In a late number of this journal, Mr. Hamilton makes some criti- 

 cisms upon an article contributed by me to the January number, having 

 reference to the transformations of this moth. That article was prepared 

 having regard, as a naatter of course, to the climate of this locality, and 

 as the specimens referred to were developed in the one season, the 

 question of variation of temperature was not under consideration. That 

 the transformation of the pupa can be furthered or delayed by atmospheric 

 conditions, is well established ; a warm room developing the imago at an 

 earlier period than natural, and an ice-house holding it in check over one 

 season, to be developed when restored to the climatic influence of another. 

 My point was, from facts ascertained by rearing in confinement, with sur- 

 roundings as near natural as possible, that the period of pupation, whether 

 early or late, did not create an earlier or later development of the imago, 

 which commonly occurred at the end of May. The history of the trans- 

 formation of this mo'.h under natural conditions, would be more satis- 

 factory than that which results from rearing in confinement, and I regret 

 that my town residence in winter denies me this study. That extraordinary 



