288 THE CANADIAN ENTOMOLOGIST. 



unknown to science, and much valuable information will be afforded by a 

 study of the collection regarding the distribution of species. Mr. Weeks 

 gives in the work before us lists of the butterflies which he has thus far 

 been able to identify. A number of interesting photographic reproduc- 

 tions give some idea of the country traversed by the collector. We look 

 forward to the issue of further instalments of this work, which will, when 

 completed, form a valuable contribution to Lepidopterological Science. 



C. J. S. B. 



CORRESPONDENCE. 



A Surprise. 



Sir, — That a Polyphemus cocoon would produce its imago the same 

 season it was made, is what I little expected to see ; and yet it has taken 

 place ; and that in a brief period of time. 



The janitor of the Y. M. C. A., London, Ont., was taking his 

 holidays in the latter part of July, and on the 22nd was in the country on 

 a fishing excursion, and found on the ground, under some trees, a Telea 

 Polyphemus cocoon. On his return, he informed me of his find. Think- 

 ing it was rather early for one of this year's make. I remarked it must 

 be an old one. He said no, that the creature was alive inside. When 

 he presented it to me, I realized at once that it was a freshly-made one, 

 as it was white and free from the slightest indication of weathering. The 

 pupa was very lively, and kicked vigorously. I placed the cocoon on a 

 cabinet close at hand and in full view, and it was much handled by 

 visitors, who expressed surprise at such an inanimate-looking object 

 being so much alive. On the 10th of August I tried to stir it into action 

 for a visitor's benefit, but failed. I left the room about half-past five, and 

 returned about half-past seven, when I noticed that the cocoon was where 

 I had not placed it ; and, on examination, I saw the moth hanging to the 

 projecting top of the cabinet. It is a female, perfectly developed, 

 medium sized and light in colouring. The question naturally arises, is it 

 double-brooded somewhere ? J. Alston Moffat. 



Mailed October 3rd, 1901. 



