Triaria is sometimes superficially similar to the Piedmont Ringlet (E. meolans), but the red post-discal band on the upf is quite wide at the costa tapering toward the lower margin. There are white-pupilled ocelli in s2-s6 and the smaller ocellus in s6 is generally present and in line with the larger ocelli in s4 and s5. However, meolans sometimes has an ocellus in s6 that is distinctly not aligned with the other two.

In 2019 this species was reclassified as Erebia triarius. I'll give it a few years before changing the web page (and all the occurrences and links associated) as it is entirely possible that the taxonomists will change it again.

observations

I believe this to be a male based on its behaviour of taking salts, although the upf red post-discal band is very wide on both wings, suggesting female, and T&L shows the male as having a constriction at upf s3, which 6900 clearly does not have. The ground colour is quite a light brown, or appears to be, but this may be because it was quite a dull day and the photograph had to be lightened considerably. The ocelli in s2-6 are very strong and those in s4/5 and almost fused completely (again suggesting female) and the large s6 ocellus is perfectly in line with them, the clear indicator of triaria. The external edges of the uph red post-discal marks are quite concave whereas T&L shows them as flat to convex.