''Icaricia acmon'', the Acmon blue, is a North American butterfly. It ranges mainly in California but can be seen north to Oregon and south through Baja California. The tops of the wings are blue with dark edges in males and brown in females. Its underside is white with black spots for both sexes with a red-orange band on the hindwing. Adults feed on nectar while caterpillars can feed on buckwheats, lupines, Lotus (genus), trefoils, and milkvetches.
Like many other lycaenid butterflies, it has a Mutualism (biology), mutualistic relationship with ants, who protect Acmon blue larvae in exchange for honeydew (secretion), honeydew that the larvae secrete.
External linksButterflies and Moths of North America - Acmon Blue
Butterflies of North America
Butterflies described in 1851