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Excuse the blue area on the abdomen - it was blue-black, but Olympus lenses have that magical capacity for outlining burnt-out areas in blue...

On the basis of the previously lamented (in the Syrphidae forum) Picker, Griffiths and Weaving field guide, I'm tentatively suggesting Elassogaster for this one. Very tentatively, seeing as it's the only Sepsid I've ever looked at, and so I haven't any real idea of how much variation they show. If it is a Sepsid.

EDIT - PS, other angles available if helpful

EDIT 2 - Details:

Forgot these:

Place: Chongwe District, Lusaka Province, Zambia
Habitat: Mammal Feces (Probably monkey)
Date: 03.11.2011
Size:6-9mm, probably 7mm.