Reports to various Correspondents. 



69 



even burrow right up the stem (Fig. 8, h), as seen in some specimens 

 sent by a correspondent of the Board of Agriculture from Cornwall. 

 In turnips they burrow into the root and may cause (and also to some 

 extent in cabbages) swellings, somewhat after the manner of the 

 Turnip Gall Weevil {Centhorhynchus sulcicollis). I know of no records 

 in this country of their attacking the leaves, but Dr. Eiley found them 

 in America burrowing into the stout midribs of cabbage-leaves in the 

 summer; a similar habit having been noticed by Mr. Fletclier, in 



a 



Fig. 8. 



l?"^ 



a, Young turnip attacked and deformed by cabbage maggot ; (), young cabbage roots 

 tunnelled by maggots. 



1891, who at the same time observed them boring through the heads 

 of winter cabbages in storehouses. 



The outer layers of the cabbage root are most attacked, the inner 

 core being too hard low down, but when they work to the upper part 

 they enter the interior of the stem as seen in the specimen figured 

 here. Sometimes so many larvte occur that they live upon the 

 outside of the decaying root as well as within ; in nearly ail cases 

 the moisture and slime in their galleries lead to rapid decay. Young 

 plants that are affected can usually be at once detected by their 

 leaves wilting. 



