Hesperus margaretae, Rougemont, 2016

Rougemont, G. de, 2016, New Bornean Staphylinidae (Coleoptera), Linzer biologische Beiträge 48 (1), pp. 559-572 : 564

Hesperus margaretae nov.sp. (Fig. 3)

3 Holotype: Borneo, Gunung Mulu, I. Hanski, Camp 3, 1020- 1650 m ASL, ‘195’ [CRO].

D e s c r i p t i o n: length: 13 mm. Head black, thorax red. Scutellum and elytra rufotestaceous, posterior half of the latter with a large black macula which does not extend to the lateral or posterior margins; abdominal urites III-VI rufo-testaceous, VII-IX black, the anterior margin of tergite VII narrowly reddish; labrum and mandibles brown, palpi pale testaceous; antennomeres I-VIII black, the bases of III and III reddish, antennomeres IX-XI creamy white; legs entirely testaceous. Fore-body devoid of microsculpture. Head large, strongly transverse, trapezoidal; eyes large, much longer than temples but not very prominent; puncturation rather sparse, consisting of a pair of frontal punctures, two punctures near inner margins of eyes, an anterior discal pair between anterior ocular punctures, a posterior discal pair between posterior ocular punctures, and a cluster of 5-6 punctures neat postero-lateral angles; pubescence and setae of head black. Pronotum slightly elongate, almost parallel-sided but very slightly narrowed posteriad; puncturation consisting of about 15 irregularly scattered discal punctures on either side of a broad mid-longitudinal impunctate area; pronotal setae black. Scutellum with about 25 small deep round punctures. Elytra 10 mm long, a little transverse, the puncturation sparse, the interstices everywhere much greater than diameter of small punctures; pubescence yellow; lateral and posterior margins with black setae, some of those on posterior 2/3 rd of lateral margins very long (2 mm). First three visible abdominal tergites with two basal lines, the raised surface between lines bearing numerous punctures; puncturation sparse, the punctures on tergites III-V round, becoming elongate on tergite VI and very elongate, almost linear on the anterior half of tergite VII, round again on tergite VIII; tergites III- VII with sparse fine short pale pubescence, the paratergite with a few dark setae; dorsum and sides of tergite VIII covered in dense, numerous erect dark setae.

M a l e: sternite VIII with a small rounded apical emargination; aedoeagus (Figs 3al, 3av).

H. margaretae nov.sp. is similar to the Bornean species H. rougemonti Schillhammer 2016 , from which it differs most conspicuously by the white three terminal antennomeres, smaller black elytral markings, parallel-sided pronotum (sides retracted towards base in H. rougemonti ), entirely red abdominal tergite VI, sparser pronotal puncturation and larger and deeper punctures of the elytra.

D e r i v a t i o n of specific name: after Margaret de Windt, Lady Brooke, Rani of Sarawak 1869-1917.