The Collaborative International Dictionary of English v.0.48:
Dipterous \Dip"ter*ous\, a. 1. (Zool.) Having two wings, as certain insects; belonging to the order Diptera. [1913 Webster] 2. (Bot.) Having two wings; two-winged. [1913 Webster]WordNet (r) 3.0 (2006):
dipterous adj 1: of or relating to or belonging to the Diptera