Eupholus Boisduval

Riedel, Alexander, 2010, Two new species of Eupholus Boisduval (Coleoptera, Curculionidae, Entiminae), with observations on coloured cuticular exudates in weevils, Zootaxa 2338, pp. 23-34 : 24

Key to the species of Eupholus Boisduval with yellow elytral patterns

1 Elytra with two yellow transverse bands ................................................................................................................. 2

– Elytra with four yellowish to greyish transverse bands ........................................................................................... 4

2 (1) Yellow transverse bands of elytra consisting of yellow scales ( Figs. 32–33 ); rostrum with median furrow ( Fig. 7 ); disc of pronotum evenly convex; medially with weak carina ....................................................... E. mimicus sp. n.

– Yellow transverse bands of elytra consisting of yellow particles that can be brushed away easily ( Figs. 34–35 ); rostrum dorsally almost evenly rounded, medially with fine carina ( Figs. 5–6 ); disc of pronotum broadly impressed along midline, concave ........................................................................................................................... 3

3 (2´) Pronotum and elytra outside of yellow bands with vestiture of small recumbent amygdaloid scales that lend the surface a grey coloration ( Figs. 2, 4 ); long suberect seta-like scales relatively sparse and inconspicuous .............. ....................................................................................................................................................... E. sedlaceki sp. n.

– Pronotum and elytra outside of yellow bands with suberect bristles that contrast to the otherwise nude black surface ( Fig. 3 ). ............................................................................................................................ E. euphrosyne Porion

4 (1´) Elytra with narrow transverse bands, all four yellow ................................................................... E. hudsoni Porion

– Elytra with basal transverse band relatively wide, yellow, apical bands narrower, greyish ........... E. helleri Porion

Figures

FIGURES 32 – 37. Base of left elytron of Eupholini with yellow coloration; overview (left); detail (right): (32 – 33) Eupholus mimicus; note yellow scales; (34 – 35) Eupholus euphrosyne; note cream-coloured setae holding yellow particles; (36 – 37) Rhinoscapha cf. thomsoni; note incrustation of yellow substance.

FIGURES 5 – 7. Head and rostrum of Eupholus spp.: (5) E. euphrosyne; (6) E. sedlaceki; (7) E. mimicus.

FIGURES 1 – 4. Habitus of Eupholus spp.: (1) E. mimicus, holotype (2) E. sedlaceki, holotype; (3) E. euphrosyne, female (Aseki); (4) E. sedlaceki, female (Wau).