I was thinking Russians too, because of the bad behavior. Carniolans are a dark bee like @R2elk said and poor producers, but they are the most docile breed.
Here's a bit from Foley's Russian Bees: Russian honey bees tend to be dark. Russian Queens are also usually dark and often have striped markings. These ‘stripes’ are similar to tiger stripes, an uneven undulation across each abdomen segment. In addition several beekeepers report that the Russian/Russian queen is dark with light blond hairs and “the longest wings of any bees I have ever worked with”.
Here's a bit from Foley's Russian Bees: Russian honey bees tend to be dark. Russian Queens are also usually dark and often have striped markings. These ‘stripes’ are similar to tiger stripes, an uneven undulation across each abdomen segment. In addition several beekeepers report that the Russian/Russian queen is dark with light blond hairs and “the longest wings of any bees I have ever worked with”.