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(This one I'm possibly a touch more comfortable with the idea that it's a Tephritid, but unfortunately there is only the one photograph (although it didn't move far, once the camera had flashed once I was not permitted within several feet of it before it was move again). Its movements, if it helps, were bouncy - as though it had been a flea in a former life and hadn't adapted its motion just because it had wings and was significantly heavier.)

- Ignore this. I'm not sure why I decided it was a Tephritid, but that's now in the past. It's much more comfortably a Lauxaniid.

Location: in amongst the leaves of sisal, ornamental garden, Chongwe District, Lusaka, Zambia

Date: 08/10/2011

Size: 4-6mm, probably at the lower end.

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I would put my money on Lauxaniidae.

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I can see what you mean and, looking back the pictures in my pitifully un-comprehensive guide, I'm not quite sure how I ended up at Tephritidae.

Thanks. Changing title to reflect.

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Probably not Peplomyza - but probably a genus very close to it

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A genus close to Pachycerina, I'd say. I think the first flagellomere (third antennal segment) is too short for it to be Pachycerina.

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Thanks, updating title to include related genera (Belatedly).