Insects, etc., Injurious to the Plum. 399 



first-named is in the form of small pale wart-like blisters ou the 

 upper surface of the leaves of plums, which are hollow Ijeueath, the 

 colour above may sometimes l)e reddish aud the galled areas uiay 

 become slightly hairy. 



The second I have usually Ibuud ou the damson and Imllace, and 

 also on the wild sloe ; the galls are situated at the eilges of the leaves, 

 which lieciime s\vollen in attenuated patches. 



I/-'. h;ie,i,le, 



-I'Ll'M LEASES ATTACKElt BY GALL 3JITES. 



Sometimes they nccur in sufficient numbers to seriously harm 

 the foliage. 



The minute mites are witli ditticulty found in the galls, owing 

 to their small size and transparent nature. 



They leave the galls wlien tlie foliage ripens and enter the l.iuds, 

 where they pass the winter just under the scales. Eepi'oduction 

 takes })lace in the galled areas. A considerable amount of the first 

 is seen in parts of the Midlands, and the latter is quite common in 

 Kent on damsons and bullace. TJie last-named I have found may 

 be checked by spraying in winter with lime, salt, caustic soda and 

 sulphur wash (/■/(/(' appendix. Washes). 



I have freijuently noticed that when the plum or pear buds are 

 full of the hibei-nating Ui'iiiji/ii/i</ir that Tits and Sparrows are 



