''Celaenorrhinus spilothyrus'', commonly known as the Sri Lanka black flat, is a species of

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

in the family

Hesperiidae Skippers are a family of the Lepidoptera (moths and butterflies) named the Hesperiidae. Being diurnal, they are generally called butterflies. They were previously placed in a separate superfamily, Hesperioidea; however, the most recent taxonomy ...

. It is found in India and Sri Lanka.

References

Butterflies described in 1868 spilothyrus Butterflies of Asia Butterflies of Sri Lanka {{Hesperiidae-stub