Milo, thanks for the links! Had similar questions my self... One of the links
(last one I think) implies that caffeine in low doses improves learning and
memory in bees.
Biggles, are you in a tea growing region? Only have a few bushes here, one
large one and perhaps a dozen smaller ones. And some of them are not old
enough to bloom. Do not have my bees yet, neighbors bees were working them
all summer and fall. As well as wasps and two varieties of bumble bees. So,
apparently not toxic in small quantities though it might be different next
to acres of tea bushes.