Found these in some old comb and a old pollen patty. Seems they are the animal protein recycler of the bug world. They like dry pet food, are used to clean the bones of cadavers and aka carpet beetle. They also like wax and pollen.
http://ento.psu.edu/extension/factsheets/larder-beetle
http://ento.psu.edu/extension/factsheets/larder-beetle