Zethus nigerrimus Gusenleitner, 2001

Tan, Jiang-Li, Carpenter, James M & Achterberg, Cornelis van, 2018, Most northern Oriental distribution of Zethus Fabricius (Hymenoptera, Vespidae, Eumeninae), with a new species from China, Journal of Hymenoptera Research 62, pp. 1-13 : 1

Zethus nigerrimus Gusenleitner, 2001 rec. n.

Figs 2-3 , 4-13

Zethus nigerrimus Gusenleitner, 2001: 659 (♀, N. Vietnam, Naturhistorisches Museum Wien); 2017: 101; 2012: 1050; Gusenleitner and Gusenleitner 2013: 138; Yeh and Lu 2017: 536.

Material examined.

1♀ ( NWUX): " CHINA: Jiangxi, Fuzhou, Zixi , 7.vi.2010, N27.70°, E117.05°, Meijuan Lou " .

Diagnosis.

Body about 13.1 mm, almost entirely black, except a pair of yellow spots near dorso-inner margin of antennal sockets, and a pair of transverse yellow lateral spots on apical margin of TI (Figs 2 , 3 , 9 ). Clypeus of ♀ densely and shallowly foveate, minutely bi-dentate apically, depressed space between teeth with a median ridge (Fig. 10 ). Anterior half of mesoscutum strongly punctate-rugose, posterior half of mesoscutum, mesoscutellum and metanotum sparsely punctate with distance between punctures much longer than diameter of puncture. Epicnemial carina (Fig. 1 , ecc) strong and raised, bordered posteriorly by narrow sulcus; episternal sulcus (Fig. 1 , ess) wide, distinctly crenulate and depressed (Fig. 3 ), epipleural sulcus (Fig. 1 eps) indistinct; mesopleura (episternum) sparsely punctate below episternal and epipleural sulci, epicnemium and posterior part of episternum coriaceous (Fig. 3 ). Propodeum coriaceous with strong striae laterally; posterior depression very shallow, almost flat and finely transversely striate, submedian carina indiscernible; propodeal lamella well developed and protruding upward (Figs 6 , 7 ). TI short, approx. 2.2 × as long as wide in dorsal view and reticulate-rugose (Fig. 6 ); anterior half of SI reticulate-rugose and foveolate, posterior half densely transversely striate (Fig. 8 ). TII approx. 1.4 × as long as wide in dorsal view, sparsely micro-punctate (Figs 12 , 13 ); TII, TIII and SII with well-developed apical lamella, flat (about 0.25 mm, 0.4 mm and 0.17 mm long respectively); SII in lateral view smoothly curved from base to apical margin (Fig. 12 ).

Distribution.

China (Jiangxi); Vietnam, Laos; Malaysia. It is a new record for China.

Figures

Figures 1 - 3. 1 Zethus coeruleopennis (Fabricius), mesosoma, lateral aspect 2 - 3 Z. nigerrimus Gusenleitner, ♀ 2 Habitus, lateral aspect 3 id., dorsal aspect. Abbreviations: ecc = epicnemial carina; eps = epipleural sulcus; ess = episternal sulcus; mps = mesopleural suture.

Figures 4 - 13. Zethus nigerrimus Gusenleitner, ♀. 4 Head and mesosoma, lateral aspect 5 mesosoma dorsal aspect 6 propodeum, dorsal aspect 7 propodeum and TI, lateral aspect 8 SI, ventral aspect 9 head, anterior aspect 10 clypeus, anterior aspect 11 antenna 12 metasoma, lateral aspect 13 metasoma, dorsal aspect.