Insects Injurious to the Apple. 41 



Prevention and Eemedies. 



The egg-masses on the cocoons, which are very noticeable in 

 winter, should be collected and destroyed ; where they occur in very 

 large numbers they may be burnt off the trees with a paraffin torch 

 to save time. Systematic collection of the egg-masses should always 

 take place after an attack. The caterpillars are easily destroyed by 

 spraying with arsenate of lead. Weak emulsions have also some 

 effect on them. 



Befeeenoes. 



(1) Beaumur, B. A. F. de. ' Histoire des Insectes,' I., p. 34 (1734-1742). 



(2) Taschenherg, B. L. ' Praktisclie Insekten-kunde,' III., p. 96 (1880). 



(3) Ormerod, E. A. ' Handbook of Insects Injurious to Orchard and Bush 



Bruits,' p. 138 (1898). 



(4) Netuman, E. 'An Illustrated Natural History of British Moths,' p. 40 



(1869). 



(5) Buckler, W. ' The LarviE of British Butterflies and Moths,' vol. III., p. 11 



(1889). 



(6) Carpenter, G. H. Economic Proceedings of the Eoyal Dublin Society, I., 



pt. 6, p. 289 (1905). 



THE GREY TRIDENT MOTH. 



(Acronycta psi. Linn.) 



This insect was received with a note that it was found attacking 

 apple and plum foliage in a garden at Liverpool in August and 

 September in 1906. 



It does not appear to have been recorded as feeding on fruit 

 trees before. But in 1907 several inquiries regarding it were 

 received from various parts of Britain. 



Stainton ('Manual Brit. Butts, and Moths,' VoL I., p. 180, 1857) 

 says of the larvse : " on various plants." The same is also given by 

 Wood in his ' British Moths ' (Vol. XL, p. 71, 1872). 



The moth measures 1^ inch across the expanded wings ; the 

 fore wings are pale grey, varied with darker marks, including one 

 long black line from nearly the middle to the base of the wings, with 

 several short branches arising from it; amongst the other marks 

 is one something like an X, about the middle, just below the 

 costa, and one shaped like the Greek yfr at the anal angle. This 

 moth exactly resembles the common Trident {Acronycta tridens), but 

 is slightly larger. 



It is also known as the Common Dagger Moth. It is found 

 resting on tree trunks in and around woods, gardens and lanes 



