7 
t 
quently mistaken for the parent of the aphides. Another very efficient 
enemy, the nine-spotted Jadybird, is shown in figure 3, 4, ¢. 
One of the most abundant syrphus-fly enemies is illustrated by 
J 
Fic. 3.—a, Adult of convergent ladybird (Hippodamia converge ns); b, pupa of same; ¢, larva of same; 
d, adult of spotted ladybird (Megilla maculata); é, larva of same; f, adult of nine-spotted ladybird 
(Coccinella 9-notata); g, larva of same; h, adult of Seymnus terminatus; i, larva of same; j, pupa of 
same. All enlarged; size indicated by hair line at right (author’s illustrations, j-j original). 
Of the natural enemies which have been enumerated, ladybirds are 
particularly valuable, owing principally 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 they often reduce 
