| Description: |
Derelomus bivirgatus Marshall, 1951 Fig. 28 Derelomus bivirgatus Marshall, 1951: 841. Diagnosis In the D. ephippiger group, this species can be distinguished by the strong curvature of the rostrum in lateral view (Fig. 28B–C) and the sides of the elytra are very convex in the male. Such a strong curvature of the rostrum is only met in D. brevis, but in the latter species, the rostrum and the body are shorter and the sides of the elytra are moderately convex in the males (Fig. 21A–C). GenBank accession numbers for the corresponding DNA barcodes: PV698441–42–43. Material examined Lectotype (here designated) KENYA • ♂; “Type [red label]” “ Mac Arthur; Makindu [Kenya, 2°16′37.2″ S 37°49′08.4″ E] 5 37 [May 1937]” “Press by; Com Inst Ent; B M 1951-179” “ Derelomus; bivirgatus Mshl.; type ♂” “LECTOTYPE ♂; Derelomus; bivirgatus; Marshall, 1951; Haran des. 2025”; NHMUK. Paralectotypes KENYA • 6 ♂♂, 7 ♀♀; Makindu; 2°16′37.2″ S, 37°49′08.4″ E; May 1937; Mac Arthur coll.; NHMUK. Other material REPUBLIC OF SOUTH AFRICA – KwaZulu-Natal Province • 5 ♂♂, 4 ♀♀, 2 specs (preserved in ethanol); St Lucia; 28°22′59.8″ S, 32°24′33.4″ E; 5 Jan. 2019; J. Haran coll.; male inflorescence of Phoenix reclinata; JHAR02044; CBGP • 2 ♀♀; Kloof; 29°47′06.0″ S, 30°50′10.8″ E; Aug. 1926; R.E. Turner coll.; NHMUK. UGANDA • 2 ♂♂, 1 ♀; Kawanda; 0°25′12.0″ N, 32°32′24.0″ E; 15 Feb.–6 Mar. 1958; P. Whalley; mercury vapor light trap; NHMUK. Redescription (♂) MEASUREMENTS. Body length 2.5–3.2 mm. COLOR. Body integument pale brown, club, apex of rostrum, post-ocular area, scutellar shield and median line of pronotum usually darker or dark brown, basal 3/5 of 4 th interstriae and 1 st interstriae at 3/5 of length generally dark brown, forming empty rectangle on elytra; dorsum with minute recumbent whitish setae, glabrous in appearance. HEAD. Rostrum slightly longer than pronotum in lateral view (1.07×), strongly and regularly downcurved, almost forming quarter circle; in dorsal view about 3.5–3.7 × as long as wide, integument densely punctate, forming 5 ... |