Honey bee colonies "die" all the time. Nobody ever tells you how to perform a proper autopsy. I'm not suggesting my methodology is
proper, by any means. However, it does tell me a lot about what caused the colony to die off; more than I would know otherwise, anyway. Here we go:
Above we see the hive before and after opening. Note that I brought the hive into the garage so I could do this out of the weather. The mould on the top bars was a first give-away of the hive condition. The feeder still contained about 2 1/2 inches of syrup and not a single dead bee, indicating it had never been touched.

Here we have the top box from above and below. Pretty, pretty comb layout, even if it does cross the bars. Bees will do what bees do. Note the queen cups along the bottom of some of the combs. Is it normal to still have these around at the end of the nectar flow?
The combs of the top box, from left to right, left face to right face:
Now, even the uninitiated will see something "not quite right" just by looking at these. Those beekeepers out there will notice that two combs in the middle have never had brood raised in them while combs on either side have. Why? I don't know and that's not really the purpose of the autopsy, but it makes an interested question.
It appears the honey dome is good and a good start to a preserved pollen (pollen with honey over top) zone has been prepared for winter. At first glance, this colony looks like the limitation was just low bee numbers. That is not the case, however. Zoom into the photos and look closer.
As you zoom in on the photos, you'll notice spotty series of sealed drone brood and an emergency queen cell. This colony lost their queen, probably right about the time the nectar flow ended. They tried to raise a new queen and couldn't. It's even possible that one or more of the worker bees had become a drone layer, but that's merely a guess based on the spotty pattern of drone cells.
I have put up photos of the combs of the bottom box in my Picasa album under the title "
2010 Winterkill Autopsy". Mostly, the features are more drone cells and a bunch of drones.
The hive died before winter even hit full-force. It died due to lack of a queen and the chaos within the hive caused by her loss. While it had low stores, there was a feeder with syrup above the hive from which they could have supplemented as the winter moved in (on warm days) and, indeed, that's what my other hives have done successfully to this point.
On the upside, this hive yielded my first honey in three years. I managed to harvest about 14 pounds (heft test, I don't have a scale to measure, yet) of lovely and tasty honey.
This comb honey certainly would not win any awards at a honey show, but it is beautiful all the same to this beekeeper. Perhaps only another beekeeper can fully grasp the tragic beauty of this parting photo. The life work of several tens of thousands of individual lives is represented here. Their desiccated corpses are scattered across fields and moulding on the remains of their home. Yet, here, I have a treat for myself and to share with my close friends.
Thank you, ladies, for giving your lives that I might enjoy your work. Though you will never realize the full potential your colony represented, you may rest in peace knowing it was not all for naught.