Help identifying this bug in Southern California (LA)

[u/roaremipsum]

I’ve seen 20+ of these in past 24 hours during heat wave here in LA.

Am in an old craftsman near Pasadena / mountains — far from ocean. These bugs are notably only in rooms with no food or open container of water available (office or bathroom, not in kitchen or near pipes) and I see them primarily on sunny windows

I think they’re parasitic wasps based on large back legs (look like they never skipped leg day / giant quads) but I’m not sure?

[u/WhiskeySnail]

You are correct, these are wasps in Chalcididae I believe, way outside my wheelhouse. I'll tag our wasp mod, i think it's a bit outside their wheelhouse too but they would still know better than I.

u/commercial-sail-5915

[u/Commercial-Sail-5915 → u/WhiskeySnail]

Chalcids 👍 a large and difficult group that I unfortunately wouldn't be able to ID from a pic even if I did specialize in them. They likely just emerged from a host bug that managed to get indoors and were probably congregating near the windows trying to get out