Allorhynchium diffinis (Giordani Soika, 1986) Tan & Achterberg & He & Carpenter, 2018

Tan, Jiang-Li, Achterberg, Cornelis Van, He, Yi-Fei & Carpenter, James M., 2018, Northeast Asian Allorhynchium van der Vecht (Hymenoptera: Vespidae), with a key to Oriental species, Zootaxa 4434 (1), pp. 49-64 : 55-57

Allorhynchium diffinis (Giordani Soika, 1986) comb. nov.

( Figs 1, 2 , 27–32 )

Archancistrocerus diffinis Giordani Soika, 1986b: 143 –146.

Type material. Holotype, ♀ ( USNM), CHINA, Szechwan, between Yachow and Suifu, 1000–2200 ft, vi.27–vii.4, 1930, DC Graham; Type no. 104005 U.S. N.M., “ Holotype Archancistrocerus diffinis, A. Giordani Soika ”.

Redescribed holotype, ♀, body length 13.2 mm (measured from anterior border of head to the posterior margin of T2; fore wing length 11.4 mm.

Head. In frontal view narrowed ventrally, slightly wider than high ( Fig. 31 ), its width 1.9 × its median length in dorsal view ( Fig. 32 ). Vertex densely covered with very coarse, punctate-reticulate, swell behind eye and then contracted ( Fig. 32 ), without cephalic foveae; distance from posterior ocelli to occipital carina 2.2 × longer than distance from posterior ocelli to inner eye margin ( Fig. 32 ). Gena and frons reticulate as vertex, gena narrower than eye in lateral view ( Fig. 28 ), strongly depressed near occipital carina, in lateral view 0.8 × as wide as eye (measured through ocular sinus); occipital carina complete, present along entire length of gena and rather narrow ( Fig. 28 ). Inner eye margins convergent ventrally; in frontal view about equal apart from each other at vertex to at clypeus. Clypeus vermiculate-reticulate ( Fig. 31 ), in frontal view 1.1 × wider than high, with apical margin strongly emarginate medially, with sharp lateral teeth ( Fig. 31 ); width of emargination 0.3 × maximum width of clypeus.

Mesosoma. Pronotal carina slightly raised, reaching ventral corner of pronotum ( Fig. 28 ); anterior face of pronotum smooth medially with sparse punctures laterally. Mesoscutum without prescutal furrows, convex, 0.9× wider than long between tegulae ( Fig. 29 ). Pronotum, mesoscutum, scutellum and metanotum coarsely punctatereticulate; mesepisternum with coarse, reticulate-punctures postero-dorsally, barely punctured antero-ventrally; epicnemial carina present ( Fig. 28 ). Metanotum slightly sloping down to apical margin, forming part of dorsal surface of mesonotum. Propodeum vertical, dorsally propodeum coarsely punctate-reticulate, median area of propodeum moderately concave ( Figs 29 ), propodeum reticulate latero-dorsally and sparsely punctate lateroventrally; submarginal carina not projecting as rounded lobe above propodeal valvula ( Fig. 28 ). Tegula smooth, emarginate near parategula and not exceeding parategula; axillary fossa narrower than long, slit-like ( Fig. 29 ).

Wings. Fore wing: Parastigma longer than half the length of pterostigma, measured along posterior part ( Fig. 27 ); second submarginal cell sessile, first and second recurrent veins both received in second submarginal cell; vein 2r-m relatively close to wing apex anteriorly, the fourth abscissa of the vein Rs about half the length of the third ( Fig. 27 ).

Metasoma. T1 punctate, with distinct transverse rim medio-laterally ( Figs 29, 30 ), truncate at base, 0.4× as long as T 2 in dorsal view ( Figs 1 , 30 ); maximum width of T1 1.9 × its length in dorsal view; T2 punctate, about as wide as long ( Fig. 30 ).

Color. Generally black but tegula, clypeus, inter-antennal area, pronotum anteriorly, metanotum, mesepisternum dorsally and propodeum laterally, rim and apical bands of T1, lateral spots and apical band T2, subapically and propodeal valvula, small patches on anterior coxa and apex of femur yellow ( Figs 1, 2 ); wings entirely yellowish tinged with veins infuscate ( Fig. 27 ).

Distribution. China (Sichuan, Fujian).

Figures

FIGURES 1, 2. Allorhynchium diffinis (Giordani Soika), ♀, holotype. 2, Habitus, dorsal aspect; 3, ibid., lateral aspect.

FIGURES 27–32. Allorhynchium diffinis (Giordani Soika), ♀, holotype. 27, wings; 28, head and mesosoma, lateral aspect; 29, mesosoma and first metasomal tergum, dorsal aspect; 30, metasoma, dorsal aspect; 31, head, anterior aspect; 32, head and pronotum, dorsal aspect.