The Lacey Act, which is a Federal law, requires that you must state that the box contains live animals or wildlife, and that you must state the Latin name, common name, and number of animals in the box. This can either be written on the box, or you can put it under the shipping label in the pouch (or any other attached envelope that they can open without opening the box), so long as you write on the box that the information is under the label so they know where to look for it.

Failure to do so, and getting caught, means not only will the shipper get a hefty fine, but so will the recipient if they knew what was in the box and accepted it when it didn't have proper labeling. It's a serious law, though many get away with ignoring it every year. Those who don't get away with it suffer a big hurting on their wallet.