Carebara diversa (Jerdon, 1851)

Material examined. Bukit Timah Hindhede Drive, 19 Nov 1989, H.K. Lua leg., ZRC _ HYM_0000158; Bukit Timah Nature Reserve, 13 Dec 1995, H.K. Lua et al. leg., NS 212C, ZRC _ ENT00000348; same locality as previous, 12 Oct 2015, D.J. Court leg., pitfall trap, ZRC _ ENT00048442; Commonwealth Avenue West, 6 Dec 2005, H.K. Lua leg., LHK 457, ZRC _HYM_0000039-40; alate queens, Holland Close (in HDB flat), 14 Apr 1990, K. Lim leg., ZRC _HYM_0000201; National University of Singapore (Clementi/Kent Ridge campus), Apr-Sep 2015, M.S. Foo & W. Wang leg., malaise trap, ZRC _BDP (multiple); Labrador beach, 29 Apr 1985, D.H. Murphy leg., ZRC _ ENT00027996; Lower Peirce Reservoir, Forest A, 25 Aug 1990, collector unknown, ZRC _ ENT0000137; Mandai, Northern Node, 4 Sep 2019, J. Tan & N. Chin leg., large fallen rotting branch, MIS_NN_ AC, ZRC _ ENT00027942; Mandai Lake Road, Rainforest Park North, Buffer area, 1.40842, 103.78319, 54 m, 4 Sep 2019, J. Tan & N. Chin leg., leaf litter, ZRC _ ENT00013862; Nee Soon Swamp Forest, 16 Apr 1992, D.H. Murphy et al. leg., Y790, ZRC _ HYM_00000037; same locality as previous, 5 Apr 2005, P. Grootaert leg., malaise trap, PGT 25046-25048, ZRC _HYM_0000038; Neo Tiew Lane, 16 Jul 2009, H.K. Lua leg., LHK 513, ZRC _HYM_0000035; Pulau Ubin (Outward Bound School grounds), 1.41662, 103.99443, 4 Dec 2016, G.W. Yong & M.K.L. Wong leg., ZRC _HYM_0001051-1054; Seletar Link, 1.40518, 103.88555, 16-18 Oct 2016, G.W. Yong leg., pitfall trap, SL3GPd1195, ZRC _HYM_0001769; Seletar Reservoir Park, 12 May 1994, collector unknown, NS 132C, ZRC _HYM_0000108 .

Material not physically examined. Non-types, CASENT0195766, PSW09562 (PSWC). Non-types, J.K. Wetterer leg. (JKWC) - Amber Road (Katong), 28 Jul 2014, vial #348; Dhoby Ghaut, Istana Park, 30 Jul 2014, vial #403; Harbourfront, 29 Jul 2014, vial #385; Katong Park, 1 Aug 2014, vial #448; Outram Park, 29 Jul 2014, vial #381; Punggol Point, 30 Jul 2014, vial #395; Singapore Botanic Gardens, 5 Aug 2014, vial #475 .

Literature. Viehmeyer (1916), Overbeck (1924), Moffett (1987, 1988), Yamane (2003), Tan & Corlett (2012) [all as Pheidologeton diversus]. Wang et al. (2018a).

Localities. Bukit Timah Nature Reserve; Commonwealth Avenue West; Dhoby Ghaut; Harbourfront; Holland Close; Katong Park; Labrador beach; Lower Peirce Reservoir; Mandai; Mandai Lake Road; National University of Singapore campus; Nee Soon Swamp Forest; Neo Tiew Lane; Outram Park; Pulau Ubin; Punggol Point; Seletar Link; Seletar Reservoir Park; Singapore Botanic Gardens.

Habitat/Ecology. This species was mainly found at edges of mature/old secondary forest, in disturbed waste woodland secondary forest fragments, or swathes of cultivated vegetation such as gardens, in urban or semi-urban settings. Colonies often form rather pervasive trunk trails on the ground (including across human-made pavements), tree trunks, and over foliage. These trunk trails are part of the species’ unique group hunting/foraging or swarm raiding strategies. These ants are known to be extreme trophic generalists, consuming a wide range of material including animal carcasses, fruits, nuts, bark etc. Alates of C. diversa frequently occur in abundance at urban residential areas following a period of prolonged heavy rain and humid weather.