Oides celebensis Duvivier

(Figs 10D–10F, 18)

Oides celebensis Duvivier, 1884: 238 (Indonesia: Sulawesi); Weise, 1924: 2 (catalogue); Laboissière, 1932: 147 (Indonesia: Sulawesi); Wilcox, 1971: 5 (catalogue); Kimoto, 1990: 218 (catalogue).

Types. Holotype ♂ (RMNH, with right elytron lost, by monotypy), labeled: “[male aedeagus glued on card] // Oides / Celebensis / type Duviv. [h, w] // Rosenberg [p] / Toelabollo [h] / Celebes. [p, w] // HOLOTYPE [p, r] // A. VACHON—det. [p] IV.1977 [h, w] // celebensis 1 holotype [p, w] // RMNH Leiden / ex Indo-Austr. / collection [p, w]”.

Redescription. Length 10.8–11.1 mm, width 6.4–7.1 mm. General color (Figs 10D–10F) yellowish; antennae yellowish brown, antennomeres II–VI and apical 1/3 of XI black; elytra metallic blue except lateral margins.

Antennae filiform in males (Fig. 18A), antennomeres IV longest, VI–IX slender, length ratios of antennomeres I– IX (X and XI lost) 1.0: 0.5: 1.0: 1.5: 1.2: 1.2: 1.1: 1.0: 0.9, length to width ratios of antennomeres I–IX 2.4: 1.6: 2.9: 3.7: 3.4: 3.3: 3.1: 3.0: 3.1; similar in females (Fig. 18B), length ratios of antennomeres I–VIII (IX–XI lost) 1.0: 0.5: 1.1: 1.5: 1.3: 1.2: 1.1: 1.0, length to width ratios of antennomeres I–VIII 2.4: 1.7: 3.0: 4.0: 3.6: 3.4: 3.2: 3.3. Pronotum transverse, 2.2x wider than long, disc convex, with reticulate microsculpture and dense, fine punctures, with transverse depression in apical 1/3; baso-lateral angles depressed, apico-lateral angles broadly rounded; lateral margin rounded and recurved; apical margin slightly concave. Elytra elongate oval, widest at middle, 1.3–1.4x longer than wide; disc without reticulate microsculpture but with dense, coarse punctures, slightly convex, epipleurae near lateral margins, located 9/10 distance between suture and lateral margins, strongly broadened at basal 1/5, apically narrowed and abbreviated at middle; humeral calli prominent, with depression posterior to calli. Penis (Figs 18C – 17E) slender, 8.1x longer than wide; parallel-sided, apex deeply bifurcate at apical 1/4; tectum small and apically tapering; slightly curved in lateral view, apex narrowly rounded; ventral surface with broad and deep notch from apex to apical 1/4, membranous areas from apex extending to basal 2/5.

Apical margin of abdominal ventrite V in female rounded. Gonocoxae reduced. Ventrite VIII (Fig. 18F) transverse, apical margin broadly rounded and truncate at middle, with dense, long setae along apical margin, disc with scattered with long setae at median longitudinal area; spiculum short and broad. Receptacle of spermatheca (Fig. 18G) as wide as pump, connected to pump; pump strongly curved; proximal spermathecal duct membranous, slender and short, sclerotized area at apex covered with transverse rows of minute setae.

Variation. The holotype possesses yellowish brown elytra, which may be abnormal for the species.

Diagnosis. This species is a member of the Oides celebensis species group. It is easily recognized by the presence of a transverse depression on the apical 1/3 of the pronotum. Males of Oides celebensis are easily separated from others by presence of a deep notch at the apex of the penis, and the small and apically tapering tectum.

Other specimens examined. INDONESIA. Sulawesi: 1♀ (MNHUB), Bantimurang, 1882, leg. C. Ribbe; 1 ex. (TARI), same locality, 4.X.2015, leg. W.-T. Wang; 1♀ (MNHUB), Bonthain, 1882, leg. C. Ribbe; 1♀ (NMHB), Kema, leg. Sarasin; 1♂ (NMHB), Mapane, leg. Sarasin.

Distribution. Indonesia: Sulawesi.