Lycogaster Shuckard, 1841

Zhang, Bing-Lan, Yan, Cheng-Jin, van Achterberg, Cornelis, Peng, Yan-Qiong & Chen, Hua-Yan, 2022, Integrated taxonomy unveils new species of Trigonalyidae (Insecta, Hymenoptera) from Yunnan, China, Journal of Hymenoptera Research 90, pp. 101-128 : 101

Lycogaster Shuckard, 1841

Figs 4 , 5 , 6

Lycogaster Shuckard, 1841: 121; Weinstein and Austin 1991: 414; Carmean and Kimsey 1998: 61. Type species (by original designation): Lycogaster pullatus Shuckard, 1841.

Diagnosis.

Body length 5.1-15.0 mm; antenna with 21-24 segments, of female widened medially (but hardly so in L. angustula ); antenna of male without tyloids; supra-antennal elevations small, without depression dorsally; vertex convex and shiny; mandibular condyli close to level of eyes; apical segment of labial palp widened and obtuse, more or less triangular; metanotum smooth, shiny and weakly convex; triangular dorso-apical part of hind trochanter separated by an oblique groove; fore trochanter subparallel-sided and distinctly longer than hind trochanter; hind tarsus slightly or not modified; basal half of third metasomal sternite with a posteriorly steep, smooth and complete transverse ledge (may be partly hidden under second sternite and rather low in L. violaceipennis ); second sternite with pair of small triangular teeth on apical protuberance (but only with pair of lobe-shaped flaps in male of L. violaceipennis ; with a strong lobe-shaped protuberance medio-apically in female of L. umbonata sp. nov., Figs 4A , 5E, F ) and sometimes absent; epipleura of tergites laterally strongly pigmented; fifth sternite of female distinctly emarginate medio-posteriorly.

Biology.

In the New World reared as hyperparasitoid of Ichneumonidae in caterpillars of the families Saturniidae and Notodontidae ( Carmean and Kimsey 1998).

Distribution.

China. Before this study, four species of this genus have been described from China, with only one species recorded from Yunnan. We describe here the second species new to science from Yunnan.

Figures

Figure 4. Lycogaster umbonata Chen & van Achterberg, sp. nov., holotype, female (En- 419021) A habitus, lateral aspect B head, anterior aspect C head, dorsal aspect.

Figure 5. Lycogaster umbonata Chen & van Achterberg, sp. nov., holotype, female (En- 419021) A wings B mesosoma, dorsal aspect C mesosoma, lateral aspect D metasoma, dorsal aspect E metasoma, lateral aspect F metasoma, ventral aspect.

Figure 6. Lycogaster umbonata Chen & van Achterberg, sp. nov., paratype, male (En- 419022) A habitus, lateral aspect B head, anterior aspect C metasoma, dorsal aspect D metasoma, lateral aspect E metasoma, ventral aspect.