quently mistaken for tlie parent of the aphides. Another very efficient 

 enem}'. the nine- spotted ladybird, is shown in tig-ure 3./', q. 



One of the most abundant syrphus-% enemies is illustrated by 

 lig'ure 4. 



Fig. 3.— a. Adult of convergent ladybird {Rippodamia convergent); b, pupa of same; c, larva of same; 

 d. adult of spotted ladybird {Megilla maculata) ; e, larva of same; /, adult of nine-spotted ladybird 

 {Coccinella 9-notata); g, larva o-f same; h, adult of Scyiniius terminatus; i, larva of same; j, pupa of 

 same. All enlarged: size indicated by hair line at right (author's illustrations, f-j original). 



Of the natural enemies which have been enumerated, ladj^birds are 

 particularh^ valuable, owing principallv to the fact that they are active 

 at all seasons, especially at the outset of aphis attack. Parasites are 

 most effective toward the end of the season, when thev often reduce 



