Story where society is modelled after bees, males may be sacrificed?

I'm reminded of "Day of the drones" by A.M. Lightner, published in 1969. Although this is a novel rather than a short story, it has a number of features in common with the question.

It is set in a world 500 years after a devastating nuclear war where civilization has only survived in Africa. Travelling in a solar-powered helicopter, some explorers from the tribe travel north and eventually reach England. There they find giant mutated insects, and a settlement of white people whose matriachal culture is copied from the social structure of the bee hive. The story is told from the viewpoint of an young African woman called Amhara, who falls in love with a handsome "drone", Evan, who is destined to be sacrificed in the same way that bee hives get ride of excess males.

The US cover summarises the plot as "An incredible adventure in the radioactive ruins of the world, where whites live like insects and the blacks are the elite.", while the German cover more entertainingly just includes an illustration of all the main plot-points.