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Parasitic Wasp? - Brachymeria tegularis

Parasitic Wasp? - Brachymeria tegularis
Sunrise Ridge Trail, Olympic National Park,, Clallam County, Washington, USA
September 11, 2011
Size: 4.5-5 mm
While I was photographing a Nisquallia olympica pair mate guarding, this tiny wasp (I think) swooped in, touched down on the female's head and swooped away again. The contact lasted much less than a second.

Even zooming in, I can't see any hint of halteres, so I'm guessing a parasitic wasp.
It could be just a coincidence, but the landing sure looked directed.
I have no images of the right side of that female's head, so I don't know if there was an egg there.

Any hint of an ID? (If not, the image can be frassed.)

We did also see a dead female Nisquallia that had been hollowed out, possibly by a parasite.

Moved from Chalcid Wasps.

Brachymeria tegularis…
These are hyperparasitoids of common grasshoppers (through sarcophid and tachinid flies). More commonly found in western states. Great find.

See reference here.

Thank you.
I found a reference to Brachonids parasitizing fly parasites on orthopterans.
This is an excellent addition to my studies of Nisquallia. (Now, if only I could find the fly parasite!)

Moved for expert attention
Moved from ID Request.

Guessing something in Chalcididae. Let's see if the experts agree.

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