The Collaborative International Dictionary of English v.0.48:

Apis \A"pis\, n. [L., bee.] (Zool.)
   A genus of insects of the order Hymenoptera, including the
   common honeybee (Apis mellifica) and other related species.
   See Honeybee.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Apis
    n 1: type genus of the Apidae: honeybees [syn: Apis, genus
         Apis]