---

If you can manage keep them separate, just in case there are two species of different sexes (both can result in slight differences in the puparia), so you should certainly send the puparia as well. Freezing will be okay but beware that they do not get too humid when you get them from the freezer. Alternatively, if you do have alcohol, I would prefer that myself. In that case just transfer specimens to alcohol (it will kill them quickly).

Cheers!