The wingspan is 11–12 mm. The forewings are dark brown, with a bright yellow area occupying the basal fourth. The apical margin of the yellow area is straight edged with a dark brown line. The apical three fourths of the forewing have a broad, iridescent blue transverse band parallel to the distal margin of the yellow area. The outer third of the forewing is iridescent bronze to violet. The area between this and the preceding fascia is sprinkled with iridescent copper scales. The hindwings are dark brown with a white patch on the basal half of the anterior margin.
- "Rectiostoma Becker in Heppner, " at Markku Savela's Lepidoptera and Some Other Life Forms.
- Neotropical Microlepidoptera XX: Revision of the Genus Setiostoma (Lepidoptera: Stenomidae)
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