Review of potter wasps with a petiolate metasoma excluding so-called " Zethinae " (Hymenoptera: Vespidae: Eumeninae) in the Lesser Sunda Islands of the Indonesian Archipelago Author Nugroho, Hari Author Kojima, Jun-Ichi Author Ubaidillah, Rosichon text Zootaxa 2013 3608 1 1 25 journal article 10.11646/zootaxa.3608.1.1 f3c60fee-04da-4bd8-98fc-4714c424450a 1175-5326 283259 FC91A0F2-BB61-4D4E-AD7D-9D9BFF5DC93E Delta eremnum (van der Vecht 1959) (Figs 32, 35, 38, 41) Eumenes eremnus van der Vecht 1959: 51, Ƥ, holotype "Labuan Badjo, Flores ", [Nationaal Naturhistorisch Museum - Naturalis, Leiden]. Material examined. SUMBA I.: 1 Ƥ (MZB, paratype of E. eremnum ), alt. 100 m , Laora, N.W Soemba (=Sumba), Dammerman, Apr.1925 ; 1 Ƥ (MZB, paratype of E. eremnum ), Mau Marru, E. Sumba, Bühler & Sutter, 22 Jul.1949 ; 1 Ƥ (MZB, paratype of E. eremnum ), Mao Marroe (=Mau Marru), 450 m , Dammerman, May 1925 ; 1 Ƥ (MZB), 10°01.197'S 120°03.385'E , alt. 320 m , Laiwanggi, A. Perrard, 15–19 Jun.2010 ; 1 Ƥ (MZB), Laiwanggi, alt. 567 m , A. Perrard, 16 Jun.2010 ; 1 3 (MZB), 10°01.061'S 120°04.163'E , alt. 567 m , Laiwanggi, A. Perrard, 16 Jun.2010 . FLORES I.: 1 Ƥ (MZB, paratype of E. eremnum ), Labuan Badjo, JK de Jong, Jun.1937 . Remarks. This species is very similar to D. sciarum and they may have sometimes been confused with each other. Next characters distinguish D. eremnum from D. sciarum [states for D. sciarum are given in the brackets]: lateral faces of propodeum barely punctured [propodeum entirely with superficial punctures]; posterior face of propodeum with paired narrow longitudinal pale-yellow bands [without such yellow bands]; apical part of volsella of male genitalia short and thick (see van der Vecht 1959: fig. 3f) [long and slender (van der Vecht 1959: fig. 2c)]. Further the following characters may help distinguishing D. eremnum from D. sciarum : female clypeus in frontal view (Fig. 32) slightly higher than wide, 1.1 × as high as wide [proportionally wider, as wide as high (Fig. 33)]; male clypeus 1.1 × as high as wide (Fig. 35) [proportionally slightly wider (Fig. 36)]; apex of male antenna without spot [with ferruginous spot]; metasomal tergum 1 in dorsal view (Fig. 41) gradually and weakly widened posteriorly, with apical width 1.9 × the basal width [only slightly widened posteriorly, with apical width 1.7 × the basal width (Fig. 42)]. Distribution. Indonesia : Sumba, Flores .