54 CHERRY. 



Prevention and Eemedies. — This attack occurs so very 

 seldom to any seriously hurtful extent that remedial or pre- 

 ventive measures are rarely called for. 



In cases (like that of the 1894 infestation) where the large 

 butterflies were observed in the spring, it certainly would be 

 desirable, so far as the safety of the leafage of fruit trees and 

 of some kinds of timber trees was concerned, to kill all that 

 could be captured. Probably, as this species is rare as well 

 as beautiful, a hint given to any neighbouring entomologist 

 would secure very efficient help in this matter. 



If patches of eggs are noticeable, these should be cut off, 

 and a good watch kept for the webby or spun nest which 

 makes a head-quarters for the caterpillars in their early 

 stages. The gnawed leafage and the fallen dirt would be a 

 guide to the whereabouts of these. On timber trees it would 

 be hard to get at these nests, but on Cherry or other orchard 

 trees something might be done by sending a boy up the tree 

 to nip these off when the caterpillars were found to be within ; 

 or strong shaking and jarring of the branches to make them 

 fall and then destroying the larvae would do good. 



Spraying with Paris-green would be an obviously useful 

 method of treatment ; and (where the great spiny caterpillars 

 were in reach) hand-picking would be still more so, as thus, 

 when they were full-grown and seeking places to suspend 

 themselves from the tree for the change to chrysalis, some- 

 thing might be done to prevent recurrence of attack ; but, 

 generally speaking, the large and beautiful insects are so 

 scarce that they might be left uninjured with little fear of 

 consequences. 



Cherry and Pear Sawfly. Selandna atra, Stephens and West- 

 wood ; Eriocampa liinacina, Cameron. 



Selandeia atra. — A, Slugworm and Sawfly, magnified, with lines showing 

 natural length ; b, cocoon. 



The small blackish moist-looking larvfe of the Cherry and 

 Pear Sawfly, known as slugworms, from their great resem- 



