164 Notes on the first Appearance of the Aphis Lanigera. 



In his garden, it attacked nothing but Apples ; Pears were 

 safe from it ; but it took Apple trees of all ages. He inclined 

 to believe it the same insect as he had been used to see on 

 Willow leaves : the easterly winds had much lessened the 

 quantity in the garden, but there were still plenty near the 

 ground. July and August were the months, in which they 

 were most numerous and pernicious. 



Nov. 17, 1790. Mr. Dickson tells me, that some of the gar- 

 deners suppose the insects to have been brought into the neigh- 

 bourhood of London, with Apple stocks from Surrey. Mr. 

 Smith, who lives at Dalston, near Hackney, declares that 

 neither he nor his neighbours have yet been troubled with 

 it ; if so, the head quarters are in the S. E. of London. 



July, 1791. Early in July, I observed this insect, in some 

 abundance, on a Codlin tree,* near the northernmost hot- 

 house in the Botanic Garden at Kew. Mr. Aiton told me 

 he never had seen it before : and though I carefully looked 

 among his other Apple trees, both in the Botanic and Kitchen 

 Garden, I did not observe any signs of it. 



August. In August, I visited her Majesty's garden at 

 Frogmore, and found the espalier Apple trees much infested. 

 Mr. Greening told me that the insect was new to him, 

 but had been there about two years ; before which time he 

 had no knowledge of it whatever. 



Aug. 20. I this day visited a house Mr. Greville had 

 lately hired at Paddington, and found in the small garden 

 annexed to it, an infinite number of the insects on the espalier 

 Apple trees. 



Dec. 19, 1791. Mr. Greville, in conversation this day, 



* This tree died, and was cut down in 1795. 



