We can certainly say that B. impatiens occurs throughout the state. Bombus affinis, B. pennsylvanicus, and B. perplexus were mainly in the Piedmont area of the state. Bombus ternarius was found only in the northern half of the state. There is very little historical or current data for comparison. He does point out that B. ternarius is rare south of Pennsylvania and this agrees with our finding it only in the northern half of the state.
Further research is needed.
As for the honeybee, it was found throughout the state. However, the density of honeybees rarely exceeded that for all bumblebees combined. We are developing a way for young naturalists to help us collect data on bumblebee and honeybee populations across the state. Hopefully, they will learn a lot about how plants and bees interact along the way. There is also a bumblebee key on that page.