114 



REPORT OF 



No. m 



The Scurfy Bark Louse {Chionaspis furfurus). — The Scurfy Bark-louse 

 is not so widely distributed throug-li Ontario as the Oyster-shell Bark-louse, 

 and does less damage. It occurs most commonly on pear, apple, gooseberry, 

 and black currant. This scale resembles the Oyster-shell Bark-louse closely 

 in shape and size, the main points in which they dift'er being in the colour 

 of the eggs and in the adult scale. 



The eggs of the Scurfy Bark-louse 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 Scurfj^ Bark-louse 

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

 Bar^-louse, 



San Jose Scale (Aspidiotuf; pertiicios^is). — The San Jose Scale is readily 

 distinguished by the characteristic shape of the female scales. They are 

 round and nearly white, with generally a clearly-defined central nipple. 

 After the first moult the scales become almost black, with a conspicuous de- 

 pressed ring around the nipple. The adult male scale is oblong in outline, 

 with the nipple near one end, and is much smaller than the female. 



Y ri 







'% 



Fig. 35— San Jose Scale. 



The following points will clearly separate the San Jose Scale from the 

 Oyster-shell Bark-louse and the Scurfy Scale : 



First : The arrangement or grouping of San Jose Scales on the bark 

 is generally characteristic, and is often suflficient to at once identify them. 



