>I have never seen anybody show that honey bees can even evaluate how
> much honey they have in the hive, let alone how much that quantity would
> last.

I seem to remember reading (not sure where) that empty comb gives off a 
pheromone that stimulates bees to forage.

Best wishes

Peter
52.194546, -1.673618 

             ***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software.  For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html

Guidelines for posting to BEE-L can be found at:
http://honeybeeworld.com/bee-l/guidelines.htm