Source : Webster's Revised Unabridged Dictionary (1913)

Flea-beetle \Flea"-bee`tle\, n. (Zo["o]l.)
   A small beetle of the family {Halticid[ae]}, of many species.
   They have strong posterior legs and leap like fleas. The
   turnip flea-beetle ({Phyllotreta vittata}) and that of the
   grapevine ({Graptodera chalybea}) are common injurious
   species.