Hi,
Now I'm getting to the really difficult ones!

I have put the times taken under each pic, the first pic was taken before the one on/in the wall, last 3 all the same bee which is probably the same as the first one but I can't be sure. They were very close in time, I wondered if the wall one was a male as it has no pollen baskets covered in pollen.
I think I may have to be happy with a Genus, if possible, there's so many which look alike!

Janet
Taken on 17th June 2008. I see this little one feeding every year on Delosperma ecklonis var. latifolia. The flower, at a guess (and looking at a tape measure) would be approx. 30mm diameter.
This one landed on the wall first, it looked like a small fly but thinner, then quickly flew into a hole where the mains electricity cable goes through the wall. I started snapping, luckily got it coming out!