The Collaborative International Dictionary of English v.0.48:

Sminthurid \Smin*thu"rid\, n. [Gr. ??? a mouse + ??? tail.]
   (Zool.)
   Any one of numerous small species of springtails, of the
   family Sminthuridae, -- usually found on flowers. See
   Illust. under Collembola.
   [1913 Webster]