''Euphilotes pallescens'', the pale blue, pallid blue or pallid dotted blue, is a species of

butterfly Butterflies are insects in the macrolepidopteran clade Rhopalocera from the order Lepidoptera, which also includes moths. Adult butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. The group comprise ...

of the family

Lycaenidae Lycaenidae is the second-largest family of butterflies (behind Nymphalidae, brush-footed butterflies), with over 6,000 species worldwide, whose members are also called gossamer-winged butterflies. They constitute about 30% of the known butterf ...

. It is found in the United States in southeastern

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

Nevada Nevada ( ; ) is a state in the Western region of the United States. It is bordered by Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the 7th-most extensive, ...

, southern

Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to it ...

and northern

Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...

.Butterflies and Moths of North America
/ref> The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the other wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan o ...

is 16–21 mm. The upperside of the males is pale blue, while the upperside of the females is grayish brown with gray overscales on the wing bases. The underside is almost white with black spots. There usually is an orange marginal hindwing band. Adults are on wing from July to September in one generation per year. They feed on the flower nectar of ''

Eriogonum ''Eriogonum'' is a genus of flowering plants in the family Polygonaceae. The genus is found in North America and is known as wild buckwheat. This is a highly species-rich genus, and indications are that active speciation is continuing. It incl ...

'' species. The larvae feed on the flowers and fruits of ''

'' species, including '' E. kearneyi'', '' E. microthecum'' and '' E. plumatella''. The larvae are tended by ants.

Subspecies

*''Euphilotes pallescens pallescens'' *'' Euphilotes pallescens arenamontana'' Austin, 1998 Sand Mountain blue *''Euphilotes pallescens elvirae'' (Mattoni, 1966)

References

Butterflies described in 1955 Euphilotes {{Polyommatini-stub