Hermerius occidentalis sp. nov.

(Figs. 10 C–D, 11E, 18A)

Diagnosis. Male of H. occidentalis is very similar to H. fairmairei but can be recognised by its large setal patches placed on the oval concave areas on the abdominal ventrites 1–4 (Fig. 11E). The species is restricted to Western and South Australia.

Description. Male. Length 28–36 mm. Body subparallel, slightly convex dorsally; head capsule length about 0.7 times width; mandibles shorter than head capsule, weakly curved towards ventral side; pronotum 0.7 times of head capsule length; elytra 3.5 times longer than pronotum. Antennal scape 1.2 times longer than antennomere 3; interorbital width over 3 times of eye length. Prosternal process width 0.75 times length of procoxal cavity, twice hypomeron width; mesoventral process narrower than prosternal process. Abdominal ventrite 1 moderately longer than each of remaining segments; ventrite 5 rounded at apex. Metatarsomeres 1–3 length ratio as 1:0.7:0.8; tarsomere 5 shorter than 1–3 combined. Female. Unknown.

Etymology. The species name is derived from the Latin word “occidentalis”, meaning “western”, indicating its type locality in Western Australia.

Types. Holotype. ♂ “WA: Kalgarin, 30 Jan. 1976, Ex. Carnaby Coll. | ANIC 25-072899 ” (ANIC) . Paratype ♂ “WA: Kalgarin, 30 Jan. 1976, Ex. Carnaby Coll. | ANIC 25-072908” (ANIC);

Other material examined (Fig. 18A). Western Australia: ANIC (1 ♂): Kalgarin, Jan. 1976. South Australia: RDKC (1 ♂): Yalata, Feb. 1987, Sundholm, A., Bugeja, J.