Polyrhachis (Myrma) striatorugosa Mayr, 1862

Material examined.; Mandai Lake Road, 3 Nov 2016, G.W. Yong leg., ZRC _HYM_0001042; Nee Soon Swamp Forest, 28 Dec 1989, Y.H. Koo & K. Snyder leg., ZRC _ ENT00047921 .

Material not physically examined. FMNHINS0002842045, tc1357712546 (FMNH).

Literature. None. New record.

Localities. Mandai Lake Road; Nee Soon Swamp Forest; Upper Peirce Reservoir.

Habitat/Ecology. This species was found in freshwater swamp forest, also primary or old secondary forest.

Remarks. A member of the P. relucens species group that includes P. nigropilosa (Kohout 2008), P. striatorugosa may be differentiated from the latter by its finely striated gaster. This species is also similar to P. sculpturata Smith, 1860, but with a distinct (though small) intercalary tooth on dorsal margin of petiole.