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Found in the morning inside my light trap.

This is the iNat CV suggestion for this moth. According to Annotated Checklist of the Moths and Butterflies (Lepidoptera) of Canada and Alaska, Pohl 2018, there are no Xylesthia species in SK, so more research may be needed here.

Found in the morning inside my light trap.

iNat CV suggests this moth. It is not listed in Annotated Checklist of the Moths and Butterflies (Lepidoptera) of Canada and Alaska, Pohl 2018 (for that matter no Callopistria are listed either) for SK.

Moth also matches very well with https://mothphotographersgroup.msstate.edu/species.php?hodges=9630 and https://bugguide.net/node/view/3965

@gpohl: I think this this one could qualify to be added as a stray for SK in your checklist

This was a difficult choice These are my reasons for choosing Caloptilia burgessiella over the four other Caloptilia species with only two yellow spots on each forewing.
Caloptilia bimaculatella: first spot too large
Caloptilia canadensisella: has small yellow tornal spot and no dark dots in first costal spot.
Caloptilia cornusella: too purple. costal spots too far apart, no semicircular curve and no dark dots in first costal spot.
Caloptilia umbratella: too purple. some yellowish-brown spots are often evident after the 2nd costal spot. This was the closest match to Caloptilia burgessiella
Caloptilia burgessiella: Fore and middle tibia dull black. Tarsi and hind legs whiteish. Face white to antenna bases. Top of head brown. Palpi white with short black tip. Thorax brown. Antennae vertex brown. Forewing umber brown with purple iridescence. First spot on wing semi-circular enclosing 2 tiny dark dots along costal edge. Second mark quadrate, 2 times as long as wide. No subterminal bars on costa. Fringe fuscous with faint lines in apex. Wingspan: 11 - 14 mm (Forbes, 1923)
@gpohl @jasondombroskie

Adult Markings: The face, palpi, tuft, and antennae are white, except for the extreme tips of the antennae which are dark brown. The thorax and basal two-thirds of the forewing are shining white, while the apical third is suffused with golden. A rather broad golden basal streak begins at the base on the costa and extends parallel to the fold to the middle of the wing or beyond. In the apical golden portion of the wing, there are three costal white streaks that are nearly perpendicular to the margin. All three have dark margins on the anterior side, but the margin is best developed in the anteriormost streak. A dorsal white streak with a dark anterior margin occurs opposite the first costal streak. A second indistinct dorsal streak that often lacks the black margin occurs opposite the second costal streak. There is a conspicuous black apical spot, and the cilia are whitish, but tipped with fuscous around the apex. The marginal line in the cilia is dark brown. The hindwing and cilia are pale grayish ocherous, and the legs are whitish ocherous.

Phyllonorycter quercialbella closely resembles P. argentifimbriella but it has only three costal streaks, compared with four in P. argentifimbriella.
Wingspan: 7 mm - Braun, 1908)
@gpohl @jasondombroskie