Color variation in Gyrostoma species. 23, 24 P. rothneyi 23 typical form 24 darker form in the southern part 25, 26 P. tenebricosus 25 typical form 26 brighter form in the southern part.

 
 
  Part of: Nguyen LTP, Carpenter J (2019) Taxonomic notes on the paper wasps of the subgenus Polistes (Gyrostoma) (Hymenoptera, Vespidae, Polistinae) occurring in Vietnam, with description of a new species. Journal of Hymenoptera Research 74: 51-64. https://doi.org/10.3897/jhr.74.47795