The key is the line, "Think S.P.C.A guidelines." I don't know the guidlines all that well, but my understanding is that bees are not considered worth protecting. At any rate, the enforcement of the list rules is done by our ORCSA advisor, who checks the List to make sure we're not doing anything dangerous/illegal. I'm not sure where exactly they would draw the line, but it appears to be somewhere between insects and mammals.
OTOH, the story I've heard from judges older than myself is that the original source of the no-animals rule is a Little Bo Peep item gone awry several years ago.
Finally, and for what it's worth, Item #228 ("T Bee A") has been revealed: Catch a bee.
--colin, Keeper of the Scrolls