The Collaborative International Dictionary of English v.0.48:

Manduca \Manduca\ prop. n.
   A genus of moths whose larvae are hornworms.

   Syn: genus Manduca.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Manduca
    n 1: moths whose larvae are tobacco hornworms or tomato
         hornworms [syn: Manduca, genus Manduca]