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I think Joanna is probably correct. Eutrichota anderssoni and pilimana are very similar and the best difference is in the postgonites! Here is part of my key to males. As you have a specimen you can check on the tergite 6 character.

5 Distance between eye margins on frons at narrowest part equal to diameter of anterior ocellus, orbits touching at this point. Dusting on scutum (viewed from above) slightly more bluish, and lateral dark vittae more distinct. Wing more yellowish tinged at base. tergite VI bare. Surstylus longer and more slender. Postgonite narrower. Distiphallus less heeled ventrally at base.. pilimana (Ringdahl)
– Distance between eye margins on frons at narrowest point twice diameter of anterior ocellus, orbits separated by an extremely narrow black midstripe. Dusting on scutum more greyish, lateral vittae less distinct. Wing more brownish tinged at base. Tergite VI with a few setulae. Surstylus shorter and not so slender. Postgonite wider. Distiphallus strongly heeled at base ventrally anderssoni (Hennig)