THE CANADIAN ENTOMOLOGIST, 97 



transformation. The beetle is mature before winter, but does not leave 

 the tree until spring." I can personally vouch for the accuracy of the 

 above, having often uncovered the beetle both in the fall and winter, as 

 well as in the spring. It is ready to fly upon the advent of warm weather, 

 and there were unquestionably other individuals about besides those 

 observed on the church walls. This species, curious in other respects, 

 furnishes also in its habits of hybernating a rather remarkable exception 

 to the general rule among the Cerambycidae. Most species of this family 

 in this latitude pass the winter in the larval stage. During many successive 

 winters' collecting I have met with no other species in its mature form. 

 Several years since a living specimen of Microdytns gazdlula Hald. was 

 dug out of the bark of a living white oak, quite late in October, where it 

 would doubtless have passed the winter months. Mr. E. P. Austin tells 

 me, in a letter written at the time, of finding a specimen of Graphisurus. 

 pusilhis Kirby, I think it proved to be, while sifting leaves in the winter 

 of 73 — '74. The only other instance which I now remember of the 

 occurrence of a Cerambycide in winter is given by H. F. Fay, of 

 Columbus, Ohio, in the Proc. Ent. Soc. of Phil., i, p. 198, in an article on 

 " Winter Collecting." He says : "The only Longicorn I have met with 

 is a single specimen of Cy rtophor us niger Lee, or a var. of Clytus albo- 



fasciatus Grey." " It was found " " in the soft wood of a decaying 



elm." F. Plaxchard, Lowell, Mass. 



Dear Sir, — 



In answer to Mr. Andrews' enquiry about Rhagium lineatum, in Can. 

 Ent., No. 4, I will say that I have found thousands under the bark of 

 pine logs during the fall and at various times until the early summer 

 months. The larva, pupa and imago are frequently found all at one time 

 and under the bark of the same log, and I have at this time a bottle of 

 specimens gathered in November from under the bark of a Jersey pine log 

 not twenty miles from Mr. Andrews' residence. 



A. S. Fuller, Ridgewood, Bergen Co., N. J. 



ON THE USE OF CYANIDE OF POTASSIUM. 



We have been favored with a letter from Mr. j. E. Chase, of Holyoke, 

 Mass., in reference to the use of bottles containing Cyanide of Potassium 

 for catching and killing moths. Mr. C. encloses a specimen label such as 



