Rindge (1959) described
eupetheciaria as four potential subspecies. The nominate form, mainly found in Arizona,
Glaucina eupetheciaria eupehetciaria was described as similar to
Glaucina escaria in most respects except size, being considerably smaller than that species. Form
lucida, mainly found in the deserts of southern California, has lighter shading of forewings and more distinct maculation than the nominate form. Form
osiana known only from extreme southeast Arizona and Mexico, have evenly dark forewings with almost no trace of AM/PM lines. Form
escariola found from extreme southeast Arizona to southwest Texas, is the darkest form of the species, with the difference in females more pronounced including a broad dark terminal hindwing band.
(2)