NATURAL ENEMIES OF APHIDES. 



Aphides are attacked by various species of predaceous and parasitic 

 enemies, and b}' fungous diseases, and under certain climatic conditions 



Fig. 7. — Two-spotted ladybird {Adalia bipunctata): a, larva; h, mouth parts of same: c, claw of same: 

 d. pupa; e, adult or beetle: /, antenna of same. A common arboreal ladybird. All enlarged Tfrom 

 Marlatt). 



these agencies exert a very important i iiriuence in their control. Species 

 of ladybirds or Coccinellidte (tig. 7), aphis lions — the larvi« of Chryso- 



FiG. 8.— The golden-eyed lace-wing fly {Clirysopa orutata): a, eggs; 6, full-grown larva; r. foot of 

 same; d, larva devouring an insect; e, cocoon;/, adult insect: fj, liead of same; h, adult, natural 

 size. All enlarged e.\cept h (from Marlatt) . 



pida' (fig. S) and II(Mn(M-obiida> — and tiie larva' of syrphus flies prey 

 upon tile apple aphides, which are destroyed also by small hynienop- 



[Cir.81] 



