In a message dated 97-03-28 02:03:04 EST, you write:
 
<<
  Today I noticed that there were a bunch of white corn kernals at the
 entrance, almost like mummified larvae.
  >>
   A bunch  how many?  If the brood nest expands beyond what the girls can
cover some get chilled and removed.
    It makes me nervous too when I see it but it is usually perfectly normal.