REST OF INSECTS. 415 



which is discontinued from November till June y with 

 the exception of a day once in six or eight weeks. The 

 crickets were brought from a distance, and let go in 

 this room, in the beginning of September 1806; here 

 they increased considerably in the course of two months, 

 but were not heard or seen after the fire was removed. 

 Their disappearance led me to conclude that the cold 

 had killed them; but in this I was mistaken; for a brisk 

 fire being kept up for a whole day in the winter, the 

 warmth of it invited my colony from their hiding-place, 

 but not before the evening; after which they continued 

 to skip about and chirp the greater part of the following 

 day, when they again disappeared; being compelled, 

 by the returning cold, to take refuge in their former re- 

 treats. They left the chimney corner on the 25th of 

 May, 1807, after a fit of very hot weather, and revi- 

 sited their winter residence on the 31st of August. 

 Here they spent the summer merely, and lie torpid at 

 present (January 1808) in the'crevices of the chimney, 

 with the exception of those days on which they are re- 

 called to a temporary existence by the comforts of a 

 fire.'* 



* Reeve, Essay on the Torpidity of Animals, p. 84. 



