Hey! I've seen some of my New World Carniolans doing this! On regular Plastic and wax foundation! I thought the bees were showing Hygenic characteristics, and were cleaning out Foulbrood or the like, so I pulled the supers and started treating with terramycin to give them a hand. How does one tell if the brood are being cleaned out because of Mites, or because of some other brood disease? One very weak hive definately had European Foulbrood- classic symptoms, but now I begin to have doubts about the others- maybe it was cleaning out mites. Ellen in Michigan Dee Lusby <[log in to unmask]> wrote: Mr Barry Birkey has posted a site for all 49ers now to post pictures of their bees chewing out varroa mites in the purple-eye stage .... http://www.beesource.com/mitechew/index.htm