RAVAGES OF CATERPILLARS. 



217 



During the three last summers, we also remarked 

 that the alders (Jllnus glutinosa] along the banks of 

 the Ravensbourne, in Kent, were extensively stripped 

 of their leaves by a saw-fly caterpillar, very like the 

 preceding, but of a larger size.* It appears to be 

 the same as one figured by Reaumurf ( Selandria 

 Alni ? STEPHENS). 



, Nematus cerprece, on the osier ; 6, Selandria nlni ? on the alder*. 



Another slimy caterpillar of a saw-fly, allied to 

 that of the cherry (Tenthredo Cerasi), is called the 

 slug worm in North America, where it has increased 



*J. R. 



VOL. VI. 



Reaumur, vol. v, pi. 11, fi . 1, 2. 

 19 



