Acromantis Saussure, 1870

A lineage of arboricolous species, also occurring on high weeds and scrubs. It includes twenty species distributed over SE Asia, Indonesia and N Australia. This is a taxonomically difficult genus and its species are hard to distinguish. There are six species listed for Borneo, but only two can definitely be confirmed at the moment.

Acromantis moultoni Giglio-Tos, 1915

Acromantis moultoni Giglio-Tos, 1915: 5

= Acromantis westwoodi Giglio-Tos, 1915: 7

Distribution. Java, Sumatra, Borneo, Sangi Islands, Talaud Islands (Werner 1930, 1933, Beier 1937, 1958, Ehrmann 2002).

Bornean records. Sarawak: Borneo Heights (CS in situ), Lanjak Entimau (4 m, 1 f, CSUB/SFDC), Mt. Dulit (Beier 1937); Brunei: Kuala Belalong (OK in situ); Sabah: Crocker Range (AFUW), Sorinsim (AFUW), Danum Valley (Helmkampf et al. 2007), Poring Hot Springs (Helmkampf et al. 2007; SMNK), Kalabakan (OK in situ), Sandakan (Hebard 1920), Darvel Bay (Giglio-Tos 1915a; ZMB); Kalimantan: Mentawir (Beier 1958).

Remarks. This species is common throughout most of northwestern Borneo. It is arboricolous and found in primary and disturbed habitats, preferring the inflorescences of weeds and shrubs in sunlit places. Females fly well and are also attracted to lights, although not as often as males. There are some uncertainties regarding the validity of this species, as the diagnostic features given by Giglio-Tos (1915, 1927) are highly variable, particularly regarding the tubercle on the vertex and the color of the antero-ventral profemoral spines, which vary considerably among specimens. Hebard (1920) and Werner (1922) pointed out that A. moultoni may be a synonym of A. oligoneura (De Haan, 1842) .

Acromantis dyaka Hebard, 1920

Distribution. N Borneo: Sabah: Labuan (Hebard 1920); Mt. Kinabalu (SMNK).