Hi Divemaster,
Do you reckon they're AHB? (Given the percentage that were below ground? If so, how long do you figure they have been in the stump? Was there evidence they had been in a taller tree, but over time moved down as the upper part went away?
Would you be interested in sending me a dozen freshly dead bees and I could genotype the colony to get an idea of what percentage Africanized genetics?