spittle insect

from WordNet (r) 3.0 (2006)

spittle insect
    n 1: small leaping herbivorous insect that lives in a mass of
         protective froth which it and its larvae secrete [syn:
         {spittle insect}, {spittlebug}]

from The Collaborative International Dictionary of English v.0.48

Spittle \Spit"tle\, n. [From {Spit} to eject from the mouth: cf.
   {Spattle}, and AS. sp[=a]tl.]
   The thick, moist matter which is secreted by the salivary
   glands; saliva; spit.
   [1913 Webster]

   {Spittle insect}. (Zool.) See {Cuckoo spit}
   (b), under {Cuckoo}.
       [1913 Webster]