PEAR AND QUINCE INSECTS 



239 



forms to the tender and helpless pupa (Fig-. 21G). From 

 10 to 20 days are spent in this stage before the ehange to the 





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\ 



''^.- \ 



:^ 



Fkj. 217. — A "wormy" quiiu-c cut open. 



beetle takes place. The beetle is at first white and soft and 

 remains within the cell for 10 days or more l)efore it is strong 

 enough to work its .^ ^^ 



way to the surface. 

 There is only one 

 generation a year. 

 In normal seasons 

 egg-laying probably 

 begins about the 

 middle of July and 

 continues for a con- 

 siderable period. 

 The number of eggs 

 laid by onc^ females 



has not been deter- Fig. 218. — A "knotty" quince, the result of cur- 

 j , , , culio work. 



mmed, but prob- 

 ably exceeds a hundred. The grul)s begin to emerge in August, 

 but many are still in the fruit at picking time. 



