THE CANADIAN ENTOMOLOGIST. 99 



On 30th July, the length was iVo, breadth iVV inch ; but excepting in 

 increased stoutness, the appearance was just as described. 



Before 30th July this larva had stopped feeding, and I expected pupa- 

 tion daily. But after a week or two of this, it seemed probable hibernation 

 had set in, and I placed it in the cellar. At intervals I examined it and 

 found it had not moved. On 19th Sept. I sent this larva with many others 

 to Clifton Springs, New York, to be placed in the "cooler" of the 

 Sanitarium, where the temp, all the year is kept at about 40° Fahr. 



On 7th March, 1885, I received all the larvae from Clifton. The 

 Nisoniades was in a small paper box, and after it had left me (19th Sept.) 

 it had stitched the paper cone it rested in by one end to the side of the 

 box. The cone was laid loosely in the box when I sent it away, and came 

 back fastened to the side, showing that at some time the larva had been 

 sufticiently active to make its nest secure. This larva eat nothing after 

 hibernation, and there was no evidence that it ever left its cone, but as I 

 had frequently to break the threads that closed the cone in order to keep 

 watch on the inhabitant, and always found the edges closed again, it was 

 evident that the larva was not always soundly sleeping. On night of 27- 

 28 April pupation took place. 



DESCRIPTION OF CHRYSALIS.— Length t%\ inch; breadth 

 across mesonotum tuV, across abdomen tW inch ; cylindrical, the abdo- 

 men conical ; head case produced, rounded, and bent down, i. e., towards 

 ventral side ; mesonotum broad, rather high, rounded, not carinated ; 

 followed by a shallow excavation which is continued across the wing 

 cases ; surface smooth ; color of head case reddish-brown ; of wing cases 

 less red, more brown, with a greenish tint; of mesonotum more yellow ; 

 of abdomen pale flesh color ; the cremaster straight, small and short, fas- 

 tened to support by a tuft of white silk ; the surface of this clirysalis is 

 covered by a fine short down, and about the head case are scattered short 

 hairs. 



The imago came forth 13th May, JV. Icelus. To make sure of the 

 species, I submitted it to Prof Lintner. The description of the 

 mature larva will answer as to color and markings for all the stages after 

 first moult. The Aspen was brought from the Catskill Mts. I have 

 formerly in one instance had the same larva here from English Filbert, but 

 the imago failed to appear. 



Very little seems to be known of the preparatory stages of the American 

 species of this genus. Prof Fernald says. But. Maine, of N. Brizo, " The 



