Callophrys polios, the hoary elfin, is a butterfly of the family Lycaenidae. It is listed as a species of special concern and believed extirpated in the US state of Connecticut.

The wingspan is 22–29 mm. Adults are on wing from April to June in one generation. The larvae feed on Arctostaphylos uva-ursi and possibly Epigaea repens. The adults feed on flower nectar from various species, including leatherleaf, pyxie, wild strawberry and willow. Hibernation takes place as a chrysalid.

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