Strumigenys emmae (Emery, 1890)

Material examined. Queens and males, I-cube building (NUS), 1.293472, 103.77633, Jun- Sep 2015, M.S. Foo & W. Wang leg., malaise trap, ZRC _BDP (multiple); alate queen, Kranji Road, 1.42638, 103.75413, 8-10 Nov 2016, G.W. Yong leg., ZRC _HYM_0001637; Labrador beach, collection date unknown, D.H. Murphy leg., ZRC _HYM_0000780; Pulau Ubin, 7 Jan 2014, Sk. Yamane leg., ZRC _ ENT00000970 ; male, University Town (NUS), 1.30622, 103.77458, 29 Jul – 5 Aug 2015, M.S. Foo & W. Wang leg., malaise trap, ZRC _ BDP0042899 .

Material not physically examined. Non-types, J.K. Wetterer leg. (USNM) – East Coast Park (Katong part), 1 Aug 2014, vial #442; Hougang, 30 Jul 2014, vial #402; Kranji, by MRT station, 2 Aug 2014, vial #452; Pasir Panjang, by MRT station, 5 Aug 2014, vial #483; Serangoon, 30 Jul 2014, vial #389.

Literature. Szabó (1909), Donisthorpe (1916), Bolton (2000) [all as Epitritus clypeatus].

Localities. I-cube building (NUS); Kranji Road; Labrador beach; Pulau Ubin; University Town (NUS).

Habitat/Ecology. This species was found in a sandy beach, also disturbed secondary forest fragments or open grassy patches in semi-urban settings, including waste woodland forest. On one occasion, individuals were found on decayed wood. Multiple alates were collected from secondary and/or open habitats via malaise traps.

Remarks. A recognized and apparently successful pantropical tramp species, S. emmae is deemed to have originated from Australia (Bolton 2000) or Australasia (Wetterer 2015), and spread nearly worldwide by human commerce and natural dispersal. The species is known to frequently thrive in highly disturbed and anthropogenically-modified habitats such as beaches and gardens (Wetterer 2012b).