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
21 tested queens were mated at the mating station:
CH-51-64-3905-1991 CH-51-64-3906-1991 CH-51-64-3907-1991 CH-51-64-3908-1991 CH-51-102-3821-1991 CH-51-102-3822-1991 CH-51-108-3588-1991 CH-51-108-3590-1991 CH-51-108-3591-1991 CH-51-108-3594-1991 CH-51-109-3986-1991 CH-51-109-3987-1991 CH-51-109-3991-1991 CH-51-110-3749-1991 CH-51-110-3750-1991 CH-51-110-3751-1991 CH-51-110-3752-1991 CH-51-110-4159-1991 CH-51-110-4160-1991 CH-51-110-4161-1991 CH-51-111-3741-1991
4 daughter colonies of queens mated at the mating station were tested:
CH-51-110-5246-1994 CH-51-110-5247-1994 CH-51-110-5248-1994 CH-51-110-5249-1994