Oh no! two Nomadas for ID

[Africa]

I do not look forward to Nomada appearing, or Andrena (other than fulva) for that matter and I had the first lot of both today. There were a bunch of Nomada bees flying around a bush round and round and settling for a few seconds on a leaf. When I took my eyes of the camera I realised there were two sizes and when I had a closer look at the photos there are obviously two species, one with yellow tegula, no red in abdomen, and one with red tegula and some red in the abdomen. This is one of them (all the photos I've got).


And this is the other:

Any pointers would be much appreciated.

[Matt Smith]

Black and yellow one - most likely N.marshamella or N.goodeniana.

Brown and yellow one - most likely N.flava but could be one of several other species.