REST OF INSECTS. 415 



which is discontinued from November till June, 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 mis- 

 taken ; 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 retreats. They 

 left the chimney corner on the 25th of May, 1807, 

 after a fit of very hot weather, and revisited 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 

 recalled to a temporary existence by the comforts of 

 a fire."* 



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



