Euphilotes rita
Euphilotes rita, the rita blue or desert buckwheat blue, is a species of butterfly of the family Lycaenidae. It is found in Wyoming, Colorado, Arizona, New Mexico and northern Mexico. The species was first described by William Barnes and James Halliday McDunnough in 1916. The wingspan is 17–22 mm. The upperside of the males is bright lilac blue with dark borders and a small orange patch at the corner of the hindwings. The upperside of the females is brown with an orange marginal band. The underside of both sexes is off white with black spots. Adults are on  wing from July to late September in one generation per year. They feed on the flower nectar of "Eriogonum" species. Its habitats include juniper-pinyon woodlands, sand dunes, oak woodland, and prairie grasslands. The larvae feed on the flowers and fruits of wild "Eriogonum" species, including "Eriogonum effusum", "Eriogonum flavum", "Eriogonum leptocladon", "Eriogonum racemosum" and "Eriogonum wrightii". The larvae are tended by ants. Adults feed on nectar from host plants and seep-willow.