#1
Fairly sure this largeish (12-15mm?) hoverfly is Senaspis, not sure which.
In weedy growth (mostly blackjacks) at the edge of hippo-cropped lawn on the Zambian banks of Zambezi, near confluence with Kafue, Lusaka Province, Zambia.
#6
Hi, sorry for delayed response. I've only seen them in the one spot, but they were fairly numerous. If I'm back there and see more, I'll try to nab one for you.