Megathymus yuccae navajo Skinner, 1911;  Comments: [= arizonae], W CO, S UT, W NM, AZ, N Sonora TL: USA (NM).

Megathymus yuccae navajo navajo pre-emergence, Warner Valley, Washington County, Utah N 37º 01.675", W 113º 26.28", elevation 3035 ft., 12-III-07 Larval foodplant: Yucca angustissima