178 



and burnt in shallow pans, and afterwards dress the 

 tree over two or three times with soft-soap, sulphur, 

 and tobacco-water, brushing it carefully into every 

 bud and crevice with a painting-brush. This mixture 

 is not made so strong as recommended by some of 

 our gardening authors, as Mr. Errington depends 

 much on the careful brushing and flooding every part 

 of the tree. {Hort, Soc, Trans. 360.) 



INSECTS. 



Aphis Persicce. — This species of aphis is the ear- 

 liest to appear in the spring, and, like others of the 

 same genus, is the produce of eggs deposited by its 

 parent in the previous autumn. It usually appears 

 in damp chilly weather, when the air being full of 

 moisture or haze, and associated by the commonalty 

 with their appearance, the weather is said to be 

 blighting. The fact that one aphis produces at the 

 rate of twenty-five young ones per day for several 

 months ; that each young one begins to multiply as 

 soon as it is born ; that one aphis kept purposely in 

 confinement saw nine generations in three months ; 

 that one aphis during its life may be the progenitor 

 of no less than 5,904,900,000 descendants; and that 

 the autumn-deposited brood are almost all simultane- 

 ously hatched in the spring ; are facts quite sufiicient 



