166 Notes on the first Appearance of Aphis Lanigera. 



are enabled to fix themselves on the tops of the roots, or on 

 the stems, where the roots are inserted. 



June, 1794. This year has been a seasonable and a warm 

 year, the easterly winds did not prevail in the spring, and in 

 the summer they have hitherto produced hot and dry wea- 

 ther. In April, we had unusually warm weather for several 

 days, which caused the leaves to unfold earlier than usual : 

 but many species, among which were the Apples, suffered 

 much from cold nights in the month of May. 



The insects are this year almost general at Spring Grove, 

 where they were unknown till last year : they are now at the 

 very top shoots of the Codlin trees. At Chelsea, they are 

 almost universal, and at many other places ; this is owing, in 

 all likelihood, to the length of time the season has afforded 

 for their increase. The autumn will shew whether the da- 

 mage they do is formidable. 



1795. The Codlin trees at Spring Grove missed a crop for 

 the first time since I recollect. They seem to be more 

 damaged by the insect than the other trees. 



1796. The Codlin trees have no fruit this year, and not 

 more than one fourth of the leaves they used to have. The 

 Russetings have as many insects upon them, but do not ap- 

 pear to have suffered in so high a degree. 



Mr. Smith, my gardener, tells me, that a gardener near 

 the King's Bench, in the Borough, used to be famous for Cod- 

 lins, the damp soil of his garden being suitable to them. 

 The trees wanted no care, and he often got £100. a year 

 for the fruit. This year he was told that the insect had so 

 completely done its duty, that not one Codlin tree remained 

 alive in the garden. 



