aphidophagous

from The Collaborative International Dictionary of English v.0.48

Aphidophagous \Aph`i*doph"a*gous\, a. [Aphis + Gr. ? to eat.]
   (Zool.)
   Feeding upon aphides, or plant lice, as do beetles of the
   family {Coccinellid[ae]}.
   [1913 Webster]