LBPIDOPTBROUS INSECTS 



251 





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EH3 jrn^g 



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Fig. 10. 



.-poiif. 



■pr,,,ci. 



T 3 



iolto-n, 



dents can be avoided by cutting the pitli very long, but 

 this looks rather clumsy. The best pith I know is Poly- 

 porus pith, sold in strips by Heynes Mathew & Co. and 

 other firms. 



If the insects have not been sorted, this should be done 

 after the labelling, especially if it is intended to arrange 



