Calyptomyrmex beccarii Emery, 1893

Material examined. Bukit Timah Nature Reserve, Jungle Fall Valley, 10 Apr 1976, D.H. Murphy leg., ZRC _HYM_0000623-624; Kent Ridge Park, YM site 2, 7 Dec 2017, W. Wang leg., ZRC _ ENT00027983; Mandai, 1.40699, 103.77853, 19 Sep 2015, M.K.L. Wong leg., Berlese extraction, ZRC _ ENT00000684; Mandai Lake Road, 3 Nov 2016, G.W. Yong leg., ZRC _HYM_0000990; same locality, collection date and collector as previous, ZRC _HYM_0001737.

Material not physically examined. FOCOL2181-2182 (ZMHB) [types of Calyptomyrmex beccarii var. glabratus] .

Literature. Viehmeyer (1916), Overbeck (1924) [both as C. beccarii var. glabratus]; Shattuck (2011).

Localities. Bukit Timah Nature Reserve; Bukit Timah Road; Kent Ridge Park; Mandai; Mandai Lake Road.

Habitat/Ecology. This species can be found mostly in young or old/mature secondary habitats in Singapore, including waste woodlands and disturbed secondary forest fragments in urban or semi-urban settings.A few occurrences were also recorded from cultivated vegetation such as gardens. Individuals have been collected from leaf litter, sometimes soil and root substrate matrices at bases of trees.