Diemictylus viridescens

from The Collaborative International Dictionary of English v.0.48

Newt \Newt\, n. [OE. ewt, evete, AS. efete, with n prefixed, an
   ewt being understood as a newt. Cf. {Eft}.] (Zool.)
   Any one of several species of small aquatic salamanders. The
   common British species are the crested newt ({Triton
   cristatus}) and the smooth newt ({Lophinus punctatus}). In
   America, {Diemictylus viridescens} is one of the most
   abundant species.
   [1913 Webster]