Yes Ontholestes tesselatus is correct. The candidate on cow dung is tesselatus too. You can find all species in the beetle gallery - compare the shape of the pronotum and colour of the legs.
Best regards
Frank
I ALWAYS look in your galleries first and therefore I betted on tesselatus, but wasn't sure. Ans since you've seen 'm all (so to speak) you're the man to ask.
Andr