stipes

from The Collaborative International Dictionary of English v.0.48

Stipes \Sti"pes\ (-p[=e]z), n.; pl. {Stipites}. [L., a stock.]
   (Zool.)
   (a) The second joint of a maxilla of an insect or a
       crustacean.
   (b) An eyestalk.
       [1913 Webster]