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EXPLANATION OP PLATE. 



Fig. 1. Cei'oplastes ceriferus ; twig with three wax-covered females, nat. size. 



Fig. 2. JPkrotnnia marciinella ; a, imago natural size ; b and c larvae, natural size and 

 enlarged, in each case divested of the flocculent matter with which tbey are 

 ordinarily covered ; d, gland like organs situated at the extremity of the 

 abdomen in the larva, enlarged ; e, leaf covered with dried larval skins as 

 they appear before being divested of their flocculent coverings, nat. size; 

 f., leaf covered with the sugary secretion emitted by the larvse. 



