THE CANADIAN ENTOMOLOGIST. 39 



I have, however, taken orono here, as Mr. Strecker wrote me that there 

 was a specimen of it in a box of Lepidoptera that I sent to him in 1872. 

 It is very rare, as I have not met with it since. 



HETEROCERA. 



SPHINGID^-:. 



Lethia gordius Cram. 



One example : Mr. Pearson. 



ZYGAENID.-E. 



Alypia Macullochii Kirby. 

 Two examples ; Mr. Knetzing. 



CORREPSONDENCE. 



Dear Sir, — 



In the October No. I find an account of Mr. Dimmock's method of 

 denuding the wings of Lepidoptera. From the account given, it seems 

 to me that it will take as much time, though perhaps less trouble, than 

 the old way of denuding them with a moistened brush. It may, however, 

 answer for butterflies and the larger moths, but for Tineidae, Tortricidge, 

 Pyralidse, and the smaller moths generally, the plan of which I have given 

 an account in a previous volume of this magazine seems to me preferable. 

 It is as follows : Take a piece of glass about one inch by three in size 

 (say a glass " slide ; " of a microscope), place the wing on it, in from one 

 to three or four drops of strong solution of potash, according to the size 

 of the wing ; cover with one of the thin pieces of covering glass of micro- 

 scopists (do not use enough fluid to float the cover glass) : hold, with a 

 clothes pin or other small forceps, the large glass over a lamp chimney 

 until it begins to boil, removing it at the first sign of ebulition, when the 

 wing will be found denuded if it is a fresh and small specimen : if large, or 

 old and dry, a little longer boiling may be necessary. The fluid may then 

 be drained off by tilting the glass a little, and all traces of the potash 

 removed by adding a few drops of water ; and the cover glass being- 

 removed, the wing may be mounted on the same glass or floated on to 

 another, or it may be at once accurately sketched by the microscope and 



