Every year, aphids infest the Sedum in my backyard, giving me ample opportunity to observe these vulnerable insects and their relationship with their various tein dik (that's Cantonese - literally meaning "enemies from the sky" - and that is where most of them come from). This Aphid Wasp is one of them. Usually, these do not stick around long enough for a photograph. They hastily clamber around, grab an aphid and fly off with it. This individual however, settled for a few moments to do some grooming. Perhaps it's just me, but it seems to have a less defined waist than other Pemphredon in the guide. I'm placing it here anyway; please correct if I'm wrong.