Libythea laius, the lobed beak, is a member of the butterfly subfamily Libytheinae found in East Africa, Madagascar, southern India, and Sri Lanka. It was described by Roland Trimen in 1879.
Libythea laius was formerly considered a synonym of Libythea labdaca, which has similar dorsal wing markings, but it differs from that species in that the rectangular orange mark in the discal cell apex is fused to or separated from the discal cell base.