xu 



CONTENTS. 



Day movements of other insects . . . . . 

 Insects have no brain, nor spinal cord 

 Want also a proper heaii; as well as blood 



Supposed pulse in insects 



No circulation 



Alleged discovery of an insect circulation, by Dr. Cams 

 How the circulation is effected in the sleep of man . 

 The same effects cannot take place in insects 

 Sleep of senses not equally profound . . . . 



Torpidity of insects in winter 



Hybernation of ants ....... 



Anecdotes from Huber ...... 



Hybernation of bees 



Discrepancies of opinion among naturalists 

 Hybernation of the hearth-cricket 



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ib. 

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ib. 

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ib. 

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ib. 

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 413 

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