Source : Webster's Revised Unabridged Dictionary (1913)

Aphis lion \A"phis li"on\ (Zo["o]l.)
   The larva of the lacewinged flies ({Chrysopa}), which feeds
   voraciously upon aphids. The name is also applied to the
   larv[ae] of the ladybugs ({Coccinella}).

Source : WordNet®

aphis lion
     n : carnivorous larva of lacewing flies [syn: {aphid lion}]