354 



Insect Pests. 



lilack. These "galls " vary from mere specks up to \ inch in length. 

 Many often unite, and then the leaves fall off. The effect may be 

 noticed as soon as the leaves begin to unfold, and it is in this early 

 period that much damage is done. 



On the fruitlets small reddish pustules appear as soon as the 

 blossom has fallen or even ^^■lleu still out. 



Attacked fruitlets were noticed to be entirely destroyed, but 

 sometimes they a]ipear tu partially reco\'er and then stunted fruit 

 Tesults. 



On cutting a section of the galled leaf the mites, very few in 



number, will be found in the niesophyll tissues. It has been noticed 

 that wlien trees have their leaves attack'ed the fruit is small and 

 gritty (1). I do not know if this is invariably the case, although 

 several correspondents have pointed it out. 



i\ 11 varieties of pears are attacked; notes have been sent nic of 

 its ]iresence on over a dozen kinds iu harmful numbers. 



Nalepa (5) records it from the service berry (Amc/n ncJiin- 

 riilfimix, Mtinch), the cotmujaster (Cntoiicuster r/i/i/m-i.^, l.ind.), 

 tile white beam tree (Sorhns uria, (.'raulz). tlie nuumtain ash (>'. 

 inirniiin'id), and the wild ser\-ice tree (S. lormi dhH^, C'rautzV 



