Someone mentioned spanish cedar a few posts back; spanish cedar is most commonly found in higher quality cigar boxes and humidor funrnishings. It's pest repellant properties are the strongest of all the cedar woods as it's ability to endure the elements. It has also become a favored wood for exterior woodwork (far superior to cypress, at least as good as redwood and far denser).
I have a large quantity on hand and have been pondering it's feasability for hive boxes, curious as to whether it's powerful aromatic properties could prove distasteful/beneficial to the bees. Anyone tried it?