Xylosandrus arquatus, is a species of weevil endemic to Sri Lanka.
Antennae consists with 5 funicular segments and obliquely truncate club.
Pronotal base covered with a dense patch of short and erect setae.
Elytral disc gradually curving into declivity which is convex and with six striae.
[3] Mainly a seedling borer, the host plants of the species include, Cinnamomum zeylanicum, Symplocos loha and Neolitsea cassia.