THE CANADIAN ENTOMOLOGIST 189 



monly attributed to them. In particular it seems well within the 

 range of possibility that they may l>e responsible for many of the 

 blotched apples and the disfiguration of other species of orchard 

 fruits that is so common throughout the fruit districts, since both 

 species have been found feeding in large numbers on fruit so 

 affected. Which of the species discussed here, if either, is re- 

 sponsible for such injury, can only be determined by experiment. 



The problem of control should be a comparatively simple one, 

 since both species are readily destroyed by the summer sprays of 

 lime-sulphur, or by weak solutions of nicotine sulphate. 



References. 



1. Parrott, P. J. Phyllocoptes schlectendali Nalepa. Science, 

 U. S. 23 :73 (1906). 



2. Parrott, P. J. The Apple and Pear Mites. . N. Y. Agr. Expt. 

 Sta., Bui. 283 : 7-32 (1906). 



3. O'Gara, P. J. Economic Importance of the Mite Phyllocoptes 

 schlectendali Nalepa. Science, N. S., 36 : 835-836 (1912). 



4. Brittain. W. H. The "Rusty Leaf" Mite and the "Apple 

 Scab" Mite. Proc. Ent. Soc. B. C, No. 4, N. S., :18 (1914.) 



5. Dash, J. S. Mites. Proc. Ent. Soc. B. C, No. 4, N. S., :37 

 (1914). 



Explanation of Plate X. 



Fig. 1. Injury to apple twig by hibernating incrustations of 

 Phyllocoptes schlectendali. 



Fig. II. Appearance of injury the next season. 



Fig. III. A, Leaf infested with Phyllocoptes; B, Uninjured leaf. 



Fig. IV. Leaves injured by Eriophyes malifolia? (Parrott). 



