THE LACE-WING FLY 129 
Almost any swarm of aphides will show us this 
fat wolf in the fold, and if not this particular one, 
another perhaps two others quite as voracious, 
one of them the fat larva of the lady-bug, and the 
other a tapering- looking grub with needle beak 
and insatiable hunger, the larva of the gold- 
banded flower-fly. 
