Approx 3 mm.
Collected at blacklight.
I'm really not sure about the subfamily but feel like it would be a good place to start.
A colony segment found under a rock, no queens or brood visible.
Happy to have seen these guys, I've been wanting to for a while.
Specimen images taken at Arizona State University.
Images:
Minor - profile
Major - profile
Minor - head
Major - head
Minor - dorsal
Major - dorsal
found under a rock, black bodies with white stripes, eggs and winged