Bareogonalos Schulz, 1907

Chen, Hua-yan, van Achterberg, Cornelis, He, Jun-hua & Xu, Zai-fu, 2014, A revision of the Chinese Trigonalyidae (Hymenoptera, Trigonalyoidea), ZooKeys 385, pp. 1-207 : 10-11

Bareogonalos Schulz, 1907 Figs 18-28

Bareogonalos Schulz, 1907: 18; Marshakov 1981: 104; Tsuneki 1991: 9; Weinstein and Austin 1991: 412; Carmean and Kimsey 1998: 60. Type species (by original designation): Trigonalys canadensis Harrington, 1896.

Nippogonalos Uchida, 1929: 79; Tsuneki 1991: 4; Lelej 1995: 12; Weinstein and Austin 1991: 412. Type species (by original designation): Nippogonalos jezoensis Uchida, 1929. Synonymized by Bischoff 1938.

Diagnosis.

Body length 8-13 mm; antenna with 18-23 segments; antenna of ♂ without tyloids; area above supra-antennal elevations flat, superficially finely rugulose and elevations small or nearly absent (Fig. 19); apical segment of labial palp widened and obtuse, more or less triangular (Fig. 22); mandibular condyli remain far removed from eyes (Fig. 22); vertex normal, at most with slight median depression dorsally (Fig. 20); head with long setae, transverse and flattened dorsally (Fig. 20); metanotum weakly convex and spaced rugose medially (in Bareogonalos huisuni : Fig. 23) or strongly lamelliform protuberant and densely sculptured; propodeum strongly areolate-rugose; hind trochanter simple, its dorsal triangular part not separated from basal part, but rarely partly differentiated ( Tsuneki 1991); hind tarsus slightly or not modified; metasoma smooth and usually shiny or finely and rather densely punctate and rather dull; vein 1-SR of fore wing medium-sized to long (Fig. 28); protuberance of third sternite of ♀ similarly sized as protuberance of second sternite in lateral view or somewhat smaller (Fig. 26).

Biology.

Reared from Vespa , Vespula , Dolichovespula and Provespa spp. ( Vespinae : Vespidae ); the larva of at least one species has a final ectoparasitoid phase ( Carmean 1991; Carmean and Kimsey 1998). Collected in August–October.

Notes.

As pointed out by Tsuneki (1991) Nippogonalos differs by having the head much narrower than the mesoscutum (nearly as wide as mesoscutum in typical Bareogonalos ). The name Nippogonalos could be used as subgeneric name in Bareogonalos for the species with an enlarged mesosoma resulting in a comparatively small head.

Key to Old World species of Bareogonalos Schulz, 1907