Polyrhachis is a genus of formicine ants found in the Old World with over 600 species. The genus is yet to be comprehensively resolved and contains many varied species including nest-weavers, swimming workers, soil and tree-dwellers. Wikipedia
Polyrhachis dives is a common polygynous monomophic arboreal weaver ant. Nests of Polyrhachis dives weaved together using ant’s silk and vegetation are found in trees as well as among shrubs and tall grasses Source
Spotted at Singapore Botanic Garden