60 On the Aphis Lanigera, or American Blight. 



pondent, Mr. Michael Walton, of Liverpool, who has 

 resided many years in the United States of America, where 

 he states the following remedy to have been used with suc- 

 cess, in the destruction of this insect. 



" Before the sap leaves the root, take the earth from 

 around the tree, at least for one foot and a half, and half a 

 foot deep. Mix a quantity of coal soot with fresh rich 

 mould, and fill up the hole again. Be careful to carry off 

 the old earth, and to burn it, lest the insect should be gene- 

 rated in it by the heat of the sun." 



Note on the Insect by William Elford Leach, 

 M. D. F. It, S. $c. 



The animal, of which so accurate an account is given in 

 the preceding Paper, is the Aphis Lanigera of Hausmann J 

 it is described, by that author, in Illiger's Magazine for 

 1802, page 440, and is referable to Latreille's third divi- 

 sion of the genus Aphis, but which division I consider to con- 

 stitute a peculiar genus distinct from Aphis, and which I 

 have named Eriosoma. 



Eriosoma has its body covered by woolly matter ; its abdo- 

 men has neither horns nor tubercles ; and its antennae are 

 short. The body of Aphis is naked ; its antennae are long 

 and setaceous ; and the abdomen is furnished with a tubercle, 

 or horn-like process, on each side. 



Since all the Eriosomata, as their name imports, have their 



