Pareumenes nigerrimus

Nugroho, Hari, Kojima, Jun-Ichi & Ubaidillah, Rosichon, 2013, Review of potter wasps with a petiolate metasoma excluding so-called " Zethinae " (Hymenoptera: Vespidae: Eumeninae) in the Lesser Sunda Islands of the Indonesian Archipelago, Zootaxa 3608 (1), pp. 1-25 : 17-19

Pareumenes nigerrimus van der Vecht 1963

(Figs 51–55)

Pareumenes nigerrimus van der Vecht 1963: 24, Ƥ, Holotype "West Flores, Reo", [Naturhistorisches Museum, Basel].

The collection in the MZB provided us with specimens of this species from Sumbawa and Timor Island, allowing us to describe the male for the first time as well as to give detailed female characters.

Material examined. SUMBAWA I.: 2 3 (MZB), 08°54'53.5"S 116°44'34.8"E, Alt. 34 m, Pasir Putih, Maluk, Sumbawa Barat, H. Nugroho & C. Rahmadi, 10 Apr.2010. TIMOR I.: 1 Ƥ (MZB), Benlutu, Sudarman HK, 23 Mar.1985; 1 Ƥ (MZB), Takari, Sudarman HK, 14 Mar.1985; 1 Ƥ (MZB), Tukai, Sudarman HK, 13 Mar.1985; 1 Ƥ (MZB), Palem, Sudarman HK, 21 Feb.1985; 1 3 (MZB), Benlutu, Sudarman HK, 23 Mar.1985; 1 3 (MZB), Lapangan, Sudarman HK, 11 Mar.1985.

Redescription. FEMALE. Body length 15–17 mm; fore wing length 13–15 mm. Head in frontal view nearly circular, as high as wide; cephalic foveae close to each other. Clypeus in lateral view strongly convex anteriorly; in frontal view as high as wide (Fig. 51); paired longitudinal carina extends from apical tip to two third basally; ventral margin emarginate medially. Labrum truncated apically. Mandible short and stout; dorsalmost tooth short and blunt.

Mesosoma distinctly depressed dorsoventrally, in lateral view 1.8 × as long as high (Fig. 54), in dorsal view 1.5 × as long as wide. Pronotal carina strongly produced anteriorly at humeral angle, obliterated dorsally. Tegula pointed posteriorly. Scutellum and metanotum nearly flat. Axillary fossa slit-like. Propodeum in lateral view barely convex anteriorly, flattened posteriorly (Fig. 54); in dorsal view bidentate posteriorly (Fig. 55).

Metasomal tergum 1 slightly shorter than mesosoma; in lateral view gradually thickened from base to apex; in dorsal view with apical width 2.5 × its basal width (Fig. 53); apical longitudinal furrow short and shallow. Metasomal tergum 2 in lateral view convex dorsally, with dorsal margin smoothly curved; sternum 2 in lateral view concave basally, flattened apically. Fore wing with prestigma 1.2 × longer than pterostigma.

Body covered with dense short ferruginous hairs. Frons strongly punctured; vertex with sparse shallow punctures. Pronotum and mesepisternum strongly punctured; mesoscutum, scutellum and metanotum glossy, with small sparse shallow punctures; posterior face of propodeum strongly punctured, with hairs slightly longer than those on other parts of mesosoma, lateral face with regular oblique striae. Metasoma covered with silky pubescence; tergum 1 glossy, with puncture as those on mesoscutum and scutellum; sternum 1 transversely striated in apical two thirds; tergum 2 glossy, with punctures more intense than those on pronotum and mesepisternum.

Body black but labrum dark brown; following parts and markings yellow: interantennal spot, band on frons running down to interantennal spot, band along lower part of ocular sinus, paired irregular-shaped basal spots on clypeus, narrow genal band along posterior margin of eye, dorsally interrupted band along pronotal carina, outer margin of tegula (sometimes reduced into anterior and posterior spots), parategula, anterior spot on mesepisternum, paired spots on scutellum, band along posterior margin of metanotum, paired spots on posterior face of propodeum, paired apical spots (each with central small ferruginous spot) on metasomal tergum 1, basal spot and paired apical spots on sternum 1, small posterolateral spots on tergum 2 (sometimes absent), minute spots on sternum 2, paired submedian apical spots on tergum 3 (sometimes united to form complete band). Antenna black; ventral side of scape yellow; flagellum ferruginous beneath. Wings fusco-hyaline, with purplish iridescence.

MALE (hitherto unknown). Body length 12–16 mm; fore wing length 11–13 mm. Head as high as wide; cephalic fovea absent. Clypeus similar to that of female, but apical part proportionally wider, in frontal view as high as wide; dorsal margin weakly convex, ventral margin emarginate medially (Fig. 52). Mandible similar to that of female, short and stout; dorsalmost tooth short and blunt. Antennal scape long, 4.5 × as long as its maximum width; flagellomere 10 significantly smaller than preceding segments; apex of the antenna obtuse. Mesoscutum with two pairs of longitudinal notauli; inner pair short and deep, outer pair long and very shallow. First metasomal segment slightly shorter than mesosoma.

FIGURES 51 – 58. Pareumenes nigerrimus and Pseudozumia indica . 51, 53–56, 58. Ƥ. 52, 57. 3. 51–55. P. nigerrimus , from Timor. 56–58. P. indica , from Java. 51, 52, 56, 57. Clypeus. 53, 58. Metasomal tergum 1, dorsal view. 54. Mesosoma, lateral view. 55. Propodeum, dorsal view. The arrow indicates the dentiform projection of the propodeum. Scale 1 mm.

Pronotum with sparse and superficial punctures; posterior part barely punctured. Mesoscutum glossy; basal two thirds nearly unpunctured, apical third with sparse and superficial punctures. Striae on lateral faces of propodeum stronger than in female. Color and marking pattern of the male specimens from Timor similar to that of female, but differing as follows: yellow band in ocular sinus more extensive, extending downward to antennal socket; clypeus nearly entirely yellow; genal band sometimes absent; antennal scape ventrally yellow; antennal flagellomeres 1–7 dark brown; flagellomeres 7–10 ventrally and terminal flagellomere ferruginous. The male specimens from Sumbawa darker as follows: frons without longitudinal spot; spots on tegula smaller; mesepisternum, scutellum and propodeum without markings; band on metanotum reduced to small spot; spots on metasomal segment 1 smaller or absent; metasomal segment 2 entirely black; wings darker, with purplish iridescence.

Distribution. Indonesia: *Sumbawa, Sumba, Flores, *Timor.