Aphis lion

from WordNet (r) 3.0 (2006)

aphis lion
    n 1: carnivorous larva of lacewing flies [syn: {aphid lion},
         {aphis lion}]

from The Collaborative International Dictionary of English v.0.48

Aphis lion \A"phis li"on\ (Zool.)
   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}).
   [1913 Webster]