Iambrix stellifer, the starry bob or Malay chestnut bob, is a butterfly of the family Hesperiidae.

It is found in southern Burma, Laos, Thailand, Malaysia and Singapore, as well as on Borneo, Sumatra, Nias, Java, Batoe and Mentawi.

[1] The habitat consists of forested lowland areas.

The larvae feed on bamboo species.

They are pale green with a yellow head.