Metapocyrtus biflavus, Rukmane-Bārbale, 2024

Metapocyrtus biflavus sp. nov.

( Fig. 5E, F View Figure 5 ; 6E, F View Figure 6 ; 7C, F View Figure 7 )

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Type material. Holotype, male ( Figs. 5E View Figure 5 ): PHILIPPINES / S Luzon, Quezon / Gen. Nakar / X. 2023 / local collector leg. (white printed label) // HOLOTYPE / Metapocyrtus biflavus / Rukmane-Barbale, 2024 (typed on red card). Paratypes (1♀): Same data as holotype, but IX. 2023. The additional label: “ PARATYPE / Metapocyrtus biflavus / Rukmane-Barbale, 2024” (typed on red card) ( DUBC) .

Diagnosis. Metapocyrtus biflavus sp. nov. is similar to Metapocyrtus jaysoniensis sp. nov. by scale pattern on prothorax and elytra of the same colour. The new species can be distinguished by the following characters: 1) Scale bands on elytra of M. jaysoniensis sp. nov. continuous, with additional two bands of blue scales on each elytron while scally markings on elytra of M. biflavus sp. nov. interrupted along midline, without additional blue scale bands; 2) elytra of M. biflavus sp. nov. shorter, sub globular while ovate in M. jaysoniensis sp. nov.; 3) rostrum of M. biflavus sp. nov. dorsally with deep triangular impression at basal half that lacks M. jaysoniensis sp. nov.; 4) transverse groove at base of rostrum shallow in M. biflavus sp. nov. while deep in M. jaysoniensis sp. nov.

Description. Holotype. Male. Dimensions: LB: 9.9; LE: 5.9; LP: 3.8; WE: 4.8; WP: 4.0; LR: 2.1; WR: 1.8. N = 1.

Integument glossy black, underside with weak- er luster. Body subglabrous, with glossy yellow, green to orange scales. Rostrum without scally markings dorsally, with short brown setae at apical half; each side covered with brown setae at apical half, small patch of green and orange elongated scales on genae.

Prothorax with the following orange scales: 1) triangular patch of round scales along anterior margin, each redirected laterally; 2) lateral patch on each side connected to underside; 3) two longitudinal bands from posterior margin to middle, each redirected laterally.

Each elytron with the following scale markings: 1) longitudinal band of green, yellow

Four new species of Pachyrhynchini from Southern Luzon, Philippines ( Coleoptera , Curculionidae , Entiminae )

and orange scales along suture from before the middle to apical 1/2; 2) longitudinal band of orange scales along interval III in all length, stripe interrupted along middle of apical half; 3) two elongated bands of green, yellow and orange scales along interval V, one at medial portion, one before apex; 4) band of green and yellow scales before lateral margin along basal half; 5) band of orange scales along lateral margin in all length.

Head smooth at base, minutely apically; forehead flattish with deep median furrow, starting from base of rostrum to posterior ocular edge; eyes not convex from outline of the head. Rostrum slightly longer than wide (LR/ WR 1.16); transverse basal groove at base of rostrum straight; dorsum moderately wrinkled, edges slightly rounded, with deep median groove from base to before middle of apical half, with deep triangular impression at basal half; dorsal contour of rostrum nearly straight, slightly widened along middle, constricted to apex, in lateral contour nearly straight, slightly raised along middle ( Fig. 6E, F View Figure 6 ).

Antennal scape slightly shorter than funicle; funicular segment I three times as long as wide, longer than II; segment II twice as long as wide, twice as long as III; segments III– VII subequal in length, as long as wide; club sub ellipsoidal, nearly three times as long as wide.

Pronotum spherical, equal in width and length (WP/LP 1.05); dorsum minutely punctured, convex, without medial longitudinal groove; dorsal contour widest at middle; lateral contour widest at middle; sub basal and subapical groove indistinct.

Elytra sub globular (LE/WE 1.22), wider than prothorax (WE/WP 1.2), 1.5 times longer than pronotum (LE/LP 1.55), nearly smooth, without expressed puncture rows; dorsal contour highest at middle; lateral contour widest at middle. Hind femora without scally markings; hind tibiae nearly without serrate along internal margins, without mucrones at apices.

Male genitalia as illustrated ( Fig. 7C, F View Figure 7 ).

Female. LB: 11.3; LE: 7.2; LP: 4.0; WE: 5.9; WP: 4.3; LR: 2.3; WR: 1.9. N = 1 for all measurements. Elytra elongate, with scale band along interval III continuous, otherwise, essentially as in males ( Fig. 5F View Figure 5 ).

Distribution. The new species is known ex- clusively from type locality General Nakar, Quezon.

Etymology. Metapocyrtus biflavus – from “bi” (two) and “flavus” (yellow/orange), indicating the two-toned colour pattern characterise for the new taxon.

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Anita Rukmane-Bārbale

Comments. The new species appear sympatri- cally and is a new mimicry pair example with Pachyrhynchus masatoshiensis sp. nov. and Metapocyrtusjaysoniensis sp. nov.