The AntsCanada Ant Forum's

There were a lot of ants flying yesterday afternoon.

#13 I am guessing is Brachymyrmex depilis.

# 12, and #14-#18 I am guessing are Lasius spp. I am hoping they aren't social parasites as I don't have colonies available for them to parasitize.

Here are some of them emerging from a nest:


#12 6.5mm



#13 ~4mm


#14 6.5mm



#15 6.5mm


#16 6.5mm


#17 6.5mm


#18 6.5mm

Your guess of Brachymyrmex depilis is correct. The rest are Lasius claviger, a social parasite of other Lasius.

http://www.formiculture.com/topic/3252-much-ado-about-the-founding-of-lasius-temporary-social-parasites/

You typically don't use an entire colony to found for social parasites; you just need workers that are as young as possible. Nobody has successfully founded Lasius claviger in captivity, so you wouldn't be wrong to release these queens.