Arctornis jonasii is a moth in the family Erebidae, originally placed in its own genus, Topomesoides, which was synonymized with Arctornis in 2015.

[1] It was first described by Arthur Gardiner Butler in 1877.

[2] It is found in Japan and Korea.

The larva feeds on Pourthiaea villosa and Sambucus sieboldiana.

This article on a moth of the subfamily Lymantriinae is a stub.