Ropalidia is a large genus of eusocial paper wasps in the tribe Ropalidiini distributed throughout the Afrotropical, Indomalayan and Australasian biogeographical regions. The genus Ropalidia is unique because it contains both independent and swarm-founding species. Wikipedia
Ropalidia erythrospila (Cameron, 1908)
Thanks, John Ascher Bees & Wasps of Singapore for the ID
Location: Choa Chu Kang – July 2022