12 daughter colonies of the 4a were tested:
CH-51-50-3773-1990 CH-51-50-3774-1990 CH-51-50-3775-1990 CH-51-50-3776-1990 CH-51-50-3777-1990 CH-51-50-3778-1990 CH-51-50-3779-1990 CH-51-106-3402-1990 CH-51-106-3412-1990 CH-51-106-3414-1990 CH-51-110-3401-1990 CH-51-110-3413-1990
6 tested queens were mated at the mating station:
CH-51-111-4263-1992 CH-51-111-4264-1992 CH-51-112-4190-1992 CH-51-112-4191-1992 CH-51-112-4192-1992 CH-51-112-4193-1992
1 daughter colonies of queens mated at the mating station were tested:
CH-51-113-4752-1993