H. B.
I've been keeping Bz for 18 years now, and to answer your question,
Honest to God, I don't know ! !  But I'd package some of it up in a small
stout cardboard / tin box [like coff drops come in] and sent it to the
Entomology Departmnt, Univ of Florida, in Gainesville, FL. Don't forget
to write a short note inside the package WITH your return address.  Oh,
send a 1$ along to show your sincere and to hasten return information.
Jon Peacock, Secretary Georgia Beekeepers Association.