The Collaborative International Dictionary of English v.0.48:

Phasmidae \Phasmidae\ n.
   1. Same as phasmatidae; the stick insects.

   Syn: family Phasmidae, Phasmatidae, family Phasmatidae.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Phasmidae
    n 1: stick insects [syn: Phasmidae, family Phasmidae,
         Phasmatidae, family Phasmatidae]