The Collaborative International Dictionary of English v.0.48:

Hylodes \Hy*lo"des\, n. [NL., fr. Gr. ? woody, wooded, muddy; ?
   a wood + e'i^dos form.] (Zool.)
   The piping frog (Hyla Pickeringii), a small American tree
   frog, which in early spring, while breeding in swamps and
   ditches, sings with high, shrill, but musical, notes.
   [1913 Webster]