THE CANADIAN ENTOMOLOGIST. 



291 



21ie Scurfy Bark louse {Chionaspis furfurus). — The Scurfy Bark- 

 louse is not so widely distributed through Ontario as the Oyster-shell 

 Bark-louse, and does less damage. It occurs most commonly on pear, 



Fig. 31. — The Scurfy Bark-louse. 



apple, gooseberry and black currant. This scale resembles the Oyster- 

 shell Bark-louse closely in shape and size, the main points in which they 

 differ being in the colour of the eggs and in the adult scale. 



The eggs of the Scurfy Bark lou^e are of a purplish colour, whilst 

 those of the Oyster-shell are a whitish-yellow. The adult scale of the 

 Scurfy Scale is also white in colour. The female scale is much larger 

 and more oval than the male scale. 



The same remedies may be employed against the Scurfy Bark-louse 

 as are advised in this article as being most suitable for the Oyster-shell 

 Bark-louse. 



