Bakeronymus Rohwer, 1922

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 : 8

Bakeronymus Rohwer, 1922 Figs 6-17

Bakeronymus Rohwer, 1922: 417; Weinstein and Austin 1991: 417; Carmean and Kimsey 1998: 59. Type species (by original designation): Bakeronymus typicus Rohwer, 1922 (examined).

Diagnosis.

Body length 7.7-10.1 mm; antenna with 13-15 segments, of female third antennal segment 0.8 times as long as fourth segment and slender (Fig. 9); apical half of antenna of female and of male with hardly moniliform and symmetric segments (Fig. 9); male antenna without tyloids; antennal sockets closer to eyes than to each other; vertex with medio-longitudinal depression dorsally, widened anteriorly and posteriorly (Fig. 8); anterior ocellus slightly lower situated than posterior ocelli in depression (Fig. 8); clypeus not differentiated from face; mandibles narrow in anterior view, mandibular condyli far from eye and submedially attached to head (Fig. 10); maxillary and labial palpi with 4 and 2 segments, respectively and apical segment of labial palp slender and tapered; maxillary palp about 0.7 times as long as mandible and with distinct segments (Fig. 11); vein 1-SR of fore wing short (Fig. 17); hind basitarsus enlarged; hind trochanter without oblique groove; propodeal foramen rounded dorsally and with lamelliform rim (Fig. 12); first tergite subpetiolate and comparatively narrow basally (Fig. 14); protuberance of second sternite of ♀ small and forked, and of third sternite large and obtuse.

Biology.

Reared from the nest of Polistinae ( Vespidae ) ( Yamane and Terayama 1983).