Four new species and two subspecies of the genus Pachyrhynchus Germar, 1824 (Coleoptera: Curculionidae: Pachyrhynchini) from Luzon Island, Philippines Author Rukmane, Anita text Baltic Journal of Coleopterology 2019 2019-12-31 19 2 141 150 journal article 10.5281/zenodo.12521148 1407-8619 12521148 Pachyrhynchus disargus sp. nov. Fig. 2 , 4 A-B. Type material. Holotype . Male. ‘’ PHILIPPINES / Luzon , Nueva Vizcaya , Kasibu / V. 2015 / local collector leg.’’ (white rectangular label, printed) ; ‘’ HOLOTYPE / Pachyrhynchus disargus / Rukmane, 2019 / det. Rukmane A. 2019’’ (red rectangular label, printed). Fig. 3. Dorsal habitus of P.phaleratus ssp. dannylayroni subsp. nov. female Integument black, body shiny, underside with weaker luster; body with markings of pale orange and blue round to recumbent scales. Dorsal and lateral habitus as shown in Fig. 2 A-B. Rostrum longer than wide (LR/ WR 1.13), slight impression on apical ½, bulging on apical 2/2; triangular impression on basal part, shallow longitudinal groove from middle of rostrum to base of forehead; lateral parts covered with rare short white hairs, patch of scales on genae. Head glabrous, finely punctured; eyes small, slightly prominent from the outline of the head. Forehead slightly bulging, smooth, nearly 1,8 times as wide as eye width. Prothorax subspherical, longer than wide ( LP / WP 1.15), widest just before the middle; weakly punctured; with the following markings: 1) two subtriangular patches of pale orange scales on dorso-lateral part near apical margin; subovate patch on each lateroventral part; in dorsal contour increased from apical margin, widest just before the middle, firmly rounded, then decreased to basal 1/3 where slightly incurved and increased to basal margin; subbasal groove strongly pronounced, subapical groove interrupted on disc. Legs stout; coxa without scaly markings; femur without hairs, patch of scales on apical part; tibiae incurved apically, covered with sparse pubescence on all length and long light hairs along internal margin; tarsus with long, golden setae. Elytra sub ovate ( LE / WE 1.69), with weakly pronounced intervals, nearly smooth; each elytron with the following markings: 1) two subovate pale orange patches on basal part; 2) four pale blue subovate patches on medial; 3)two sutural patches, one just before midline, one close to apex; 4) three subovate patches on apical ½; 4) one triangular patch near apex laterally; widest just at the middle; on dorsal dimension narrow at the base, gradually increased to middle, widest just in the middle, then roundish and gradually decreased to apex; apex rounded, with weak pubescence. Elytra wider than prothorax ( WE / WP 1.56), more than twice as long as prothorax ( LE / LP 2.29). Ventrites densely covered with blue to green round scales, minutely pubescent, mingled with few longer light color hairs. Genitalia as shown in Fig. 4 A-B. Female. Unknown. Differential analyses. P.disargus sp. nov. is similar on general appearance to P. argus Pascoe by its shape of pronotum and elytra, yet, it is easily distinguishable by the following features: 1) narrower pronotum, that is widest just before middle, increased at subbasal part; 2) unique markings on pronotum and elytra of P.disargus sp. nov. . Etymology. This species was named after it’s similarity to P. argus .