6 P i t y o p h t Ii o r u s m i n u t i s s i m u s Zimm., fore leg ; a, outer 



border. (Greatly enlarged) 



7 Pityogenes undes. sp., antenna. (Greatly enlarged) 



8 Pterocyclon mali Fitch, antenna. (Greatly enlarged) 



9 Pityophthorus minutissimus Zimm., antenna. (Greatly 



enlarged) 



1 68 



