EFFECTS OF COLD UPON INSECTS. 99 



migratory birds seem to have been aware of tliis 

 abundance of insects by tlieir appearing earlier than 

 usual. We saw a pair of nightingales at Greenhithe 

 on the 21st of March, and a number of swallows the 

 same week at Lee, — which is two or three weeks be- 

 fore their average time *. 



*J. R. 



