''Nacaduba ollyetti'', the Woodhouse's four-line blue, is a species of
Lycaenidae
Lycaenidae is the second-largest family (biology), 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 ...
butterfly. It is
endemic
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...
to
Sri Lanka
Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka, also known historically as Ceylon, is an island country in South Asia. It lies in the Indian Ocean, southwest of the Bay of Bengal, separated from the Indian subcontinent, ...
.
Description
Wingspan is about 30–32 mm. Dorsal surface of male is brown with purple blue or deep purple tinge. Female has more bluish tinge on paler metallic blue dorsal surface. Tornus with a large eyespot. Underside of male is faintly visible with streaks, otherwise it appears as unmarked to naked eye.
References
{{Taxonbar, from=Q13484932
Nacaduba
Butterflies of Sri Lanka
Butterflies described in 1947