The wingspan is 18.3–20 mm for males and 20.5–23 mm for females. The forewings are white with scattered cinnamon brown scales and a narrow band of brown scales. The hindwings are light brownish grey. Adults are on wing in August.
The species epithet refers to the Baja California peninsula of north-western Mexico, which circumscribes the range of the species.
- Olle Pellmyr & Manuel Balcázar-Lara, 2008, Zoological Journal of the Linnean Society 152 (2): 297-314 
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