These look just like what I have. Have you found an effective treatment? Have you found out what they are? I have had nests of them open up twice in the last week to 10 days. HUNDREDS of them come out in all it's life stages from egg to adult (about 1/2").
Thanks for your post, please post if you're still posting or reading on this forum, how things are for you.
I'd be so grateful to know if you found out anything about them!