Galls caused by the larvcc of Ceuthorhynchus 

 sulcicoUis Gyll. 



the root of the Common Swedish Turnip, 

 Brassica rutabaga De C. 



PLATE 9. 



This specimen furnishes a typical illustration of a galled 

 swede turnip. It is also interesting because of the symmetrical 

 arrangement of the galls around the base of the root. It still 

 further shows that the ova are always deposited on or in the 

 subterranean portion of the root, and not on any part which 

 is above ground. The lower third only of this root was below 

 ground. The root has around it seventeen larval chambers. 

 None have coalesced. 



The illustration, which is half natural size, is of a specimen 

 taken out of a field near Hastings by the author. 



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



