Species unknown (to me), as is the case for nearly all flower wasps. This shot was taken just seconds after the male managed to connect with the flightless female. He had been holding her with his legs, but now the coupling is secure.

Subfamily Thynninae, species unknown. The wingless female is feeding from a drop of liquid supplied by the much larger male. Most species feed head-to-head, but this one regularly adopts this posture. I’ve not seen this reported in descriptions of flower wasp behaviour.