Galls caused by the larvae of Ceuthorhynchus 

 sulcicollis Gyll. 



on 



the root and root-fibres of the Common Swedish Turnip, 

 Brassica rutabaga De C. 



PLATE 10. 



The specimen shown in the illustration was taken out of 

 a field near Hastings by the author. 



It is remarkable on account of the enormous proportions 

 of the swelling on one of the root-fibres as compared with the 

 slender nature of the fibre itself. The root has upon it twenty- 

 eight larval chambers, eighteen of which may be seen in the 

 illustration, seven of them on the left-hand side having 

 coalesced. 



For details connected with this species, see pp. 41 and 42. 



