The Collaborative International Dictionary of English v.0.48:

Caddice fly \Caddice fly\ (Zool.),
   a small mothlike species of trichopterous insect, whose larva
   is the caddice; it has two pairs of hairy membranous wings
   and aquatic larvae.
   [1913 Webster + WordNet 1.5]

WordNet (r) 3.0 (2006):

caddice fly
    n 1: small moth-like insect having two pairs of hairy membranous
         wings and aquatic larvae [syn: caddis fly, caddis-fly,
         caddice fly, caddice-fly]