Published online by Cambridge University Press: 31 May 2012
An examination of the female genitalia of forms belonging to the redimicula complex of the genus Euxoa disclosed that the group consists of four species, redimicula (Morrison), servita (Smith), auripennis new species, and arizonensis new species. Diagnostic characters of the species in the group are discussed. A discriminant analysis was successfully used on characters of the male genitalia to segregate the males. A key to females and males of the species and subspecies of the redimicula group is included.