Labus amoenus van der Vecht, 1935

Li, Ting-Jing & Carpenter, James M., 2018, A taxonomic account of the genus Labus de Saussure, 1867 (Hymenoptera, Vespidae, Eumeninae) with descriptions of three new species, Journal of Hymenoptera Research 65, pp. 23-46 : 23

Labus amoenus van der Vecht, 1935

Figs 20-22

Labus armatus Cameron, 1900: 536; Dalla Torre 1904: 13; Kohl 1907: 242; van der Vecht 1935: 159; Gusenleitner 2011: 1358. Junior secondary homonym of Labus armatus (Gribodo, 1891).

Labus amoenus van der Vecht, 1935: 159, 161, 162; 1963: 9; Gusenleitner 1988: 189, 194; Girish Kumar et al. 2014: 29-37.

Material examined.

8♀♀ 2♂♂, Vietnam, Nghē An Prov. Khe Bo 19°3'N, 104°43'E, 123m, 25-28.IV.1998, James M. Carpenter (AMNH) ; 1♂, Vietnam: Hà Giang Prov. Cao Bō, Tham Ve River 22°45'N, 104°55'E, 295m, 24-25.IV.2000, James M. Carpenter (AMNH) ; 2♀♀ 2♂♂, China, Yunnan Prov., Puer City, Lancang County, Mulan Town , 27.VII.2014, Pan Huang (CQNU) ; 2♂♂, Malaysia, Johor Panti Forest Reserve 01°51.45'N, 103°53.10'E, 23m, 1. VI. 2009, James M. Carpenter (AMNH) ; 2♀♀, Malaysia, Johor Kota Tinggi Waterfalls , 01°49,45'N, 103°50.02'E, 16m, 1.VI.2009, James M. Carpenter (AMNH) ; 1♂, Malaysia, Johor Panti Nature Park , 01°47.16'N, 103°56.33'E, 27m, 30.VII.2009, James M. Carpenter (AMNH) ; 1♂, Thailand, Phetchabun Khao Kho NP decid. Forest 16°39.587'N, 101°08.134'E, 220m, Malaise trap, 26.II-5.III.2007, Somchai Chachumnan & Saink Singtong leg. (AMNH) ; 1♂, Thailand, Phetchabun Khao Kho NP decid. Forest , 16°32.539'N, 101°2.483'E, 524m, Malaise trap, 12-19.XII.2006, Somchai Chachumnan & Saink Singtong leg. (AMNH) ; 1♂, Thailand, Ratchathani Pha Taem NPE. of ThungLuang Dipt. for 15°39.989'N, 105°30.468'E, 238m, Malaise trap, 1-7.I.2007, Thongkam & Pakdee leg. (AMNH) ; 1♀, Thailand, Chaiyaphum TatToneNP Nrsry at hd.wtr., 15°58,344'N, 102°2.169'E, 257m, Malaise trap, 19-26.II.2007, Tawit Jaruphan & Orawan Budsawong leg. (AMNH) ; 1♂, Singapore, under bank Felled trees New Road by Racecourse , 25.IV.1976 (AMNH) .

Diagnosis.

Body length 7.0-8.0 mm; head (Figs 20-21 ) in frontal view slightly longer than wide, its sides somewhat flattened; in female, frontal fovea (Fig. 22 ) elliptical; punctures on clypeus sparse and indistinct; clypeus in female basally with a yellow transverse band and in male almost totally yellow in some specimens; anterior angles of pronotum projecting strongly outwards; the eraised area of the scutellum with slightly projecting posterior angles; propodeum posteriorly on each side with a moderate tooth above the apical spine formed by the submarginal carina; metasomal petiole long and slender, total length of petiole 7.93 × its basal width and 3.31 × apical one; swollen part of metasomal petiole less than (0.89 ×) half of the length of the petiole and irregularly punctate.

Distribution.

Vietnam (new record), China (new record); India; Laos; Malaysia; Singapore; Indonesia.

Figures

Figures 20 - 24. 20 - 22 Labus amoenus van der Vecht, 1935. 20 head in frontal view, ♀ 21 Head in frontal view, ♂ 22 frontal fovea, ♀ 23 - 24 Labus angularis van der Vecht, 1935. 23 habitus, ♀ 24 head in frontal view, ♀.