24 REPORT ON INJURIOUS INSECTS FOR 1903. 



with paraffin emulsion; this should be done three or four times, at 

 intervals of two or three days. 



All young stock should be fumigated with hydrocyanic acid 

 gas before being planted. 



FIG. IX. -THE MUSSEL SCALE (Mytilaspis fomorum). 



i. Upper surface of female scale. 2. Lower surface of same. 3. Eggs. 

 All greatly enlarged. 



THE OYSTER-SHELL BARK LOUSE 



Aspidiotus ostreaeformis, Curtis. 



Several correspondents in Worcestershire and Gloucestershire 

 have sent in twigs cut from plum trees, also twigs from willows, 

 infected with this scale. 



The measures recommended for the Mussel Scale apply with 

 equal force to this species. 



THE WHITE WOOLLY CURRANT SCALE. 

 Pulvinaria ribesii, Sign. 



From Walsall, Wednesbury, and the neighbouring district^ 

 cuttings of currant and gooseberry bushes have been received during 

 the past season very badly infested with this scale. Much good 

 has been done by cutting down the worst and burning the cuttings, 

 also by the application of the soda and potash sprayfluid in the 

 winter. 



THE COCKCHAFER. 



Melolontha vulgaris, Fabr. 



In the Midland Counties 1905 has been what is popularly- 

 termed a " chafer year," and in all the counties the larvae have 

 proved most destructive. 



