Lasius are the king of hard to id, but able to without genetic testing. I mean, once you know how, and if you have a microscope its not that hard though. All you have to do is count, and look at the shape of the teeth on the mandible, and look at what type of hairs there are on the antennal scape. At least for niger group.
Species being kept:
Solenopsis "plebeius", Camponotus maritimus, Formica cf. subaenescens, Formica cf. aerata, Lasius cf. americanus, Lasius aphidicola, Lasius brevicornis, Lasius nr claviger, Nylanderia vividula, Temnothorax nevadensis, Temnothorax chandleri, Temnothorax arboreus Solenopsis validiuscula, Solenopsis truncorum, Solenopsis xyloni, Formica perpilosa, Formica cf. lasiodes, Formica cf. neogagates Pogonomyrmex californicus, Pogonomyrmex salinus, and Myrmecocystus testaceus!!!!
Hoping to find this year:
Myrmecocystus, Liometopum occidentale, Camponotus essigi, Camponotus fragilis, Manica bradleyi, Formica perpilosa, Pheidole hyatti, and a Parasitic Formica sp.
People are stupid. It explains a lot...