October, '12] 



EWING: CITRUS RED SPIDER 



415 



scattered about all over the leaves. It is during this season that the 

 species becomes very injurious to the trees by sapping the juices from 

 the leaves and causing the latter to become pale or spotted and to curl 

 up around the edges. 



This species doubtless can be held in check by the use of summer 

 sprays similar to those recommended for it in California; but, since 

 the -s^-inter is passed only in the egg instar and these eggs are deposited 

 in an exposed position, doubtless some dormant spray will be found 

 that \^'ill be more satisfactory. I may add that lime-sulphur is not a 

 satisfactory winter spray for the eggs of this mite. It will not kill 

 the embrj'os in the eggs at all, but will, however, kill some, and at 

 times perhaps 60 percent or 70 percent, of the larvae after they have 

 emerged. 



The following records of the species in Oregon have been made and 

 are here presented in tabular form: 



RED SPIDER IN OREGON 



