Hylomesa punctata Liao, Chen & Li, 2022

Liao, Xiang-Ping, Chen, Bin & Li, Ting-Jing, 2022, A taxonomic revision of the subfamily Myzininae from China, with a key to the Chinese species (Hymenoptera: Tiphiidae), Zootaxa 5154 (2), pp. 152-174 : 155

Hylomesa punctata Liao, Chen & Li , sp. nov.

( Figs 1–8 )

Material examined. Holotype, ♀, China, Yunnan Province, Wenshan City, Malipo , 23°7′30″N, 104°42′7.19″E, 1124 m, V.2017, Yanqiong Peng ( CNU); paratype, 1♀, China, Tibet, Linzhi City , Motuo County, Motuo Town , 29°19′30.97″N, 95°19′44.42″E, 1100 m, 21.V.1980, Gentao Jin & Jianyi Wu ( CNU).

Diagnosis. This species can be easily distinguished from all other members of the genus by the following character combination: transverse head ( Fig. 3 ) shape, length from antennal insertion to occiput 0.86× width across eyes; surface of vertex close to occipital carina with very sparse punctures and largely smooth; punctures on dorsum of propodeum ( Fig. 6 ) denser and more irregular; dorsum of propodeum with a broadly median groove.

Description. Female. ( Fig. 1 ). Body length 23.0– 23.1 mm, fore wing length 13.3–13.4 mm. Body almost black; mandible ( Fig. 2 ) with a small area dark red (another specimen almost wholly reddish except black apex), and spines of legs more or less brownish. Wings strongly infuscate with weakly purple luster except hind wing basally.

Head. Head ( Fig. 3 ) transverse in dorsal view, length from antennal insertion to occiput 0.86× width across eyes; median lobe of clypeus ( Fig. 2 ) narrowly emarginated apically, with indistinctly longitudinal median carina; frons ( Figs 2, 3 ) with shallow median groove reaching anterior ocellus, lower half with coarse and dense punctures, upper half with relatively sparser punctures; OOD 1.27× POD and 0.45× OCD ( Fig. 3 ), surrounding area of ocelli with coarse and dense punctures; vertex ( Fig. 3 ) close to posterior area of hind ocellus with dense punctures, close to occipital carina with much sparser punctures than those of frons and largely smooth, anterior ocellus closer to apex of antennal tubercle than to occiput.

Mesosoma. Pronotal transverse raised carina strongly present ( Fig. 4 ), median length of pronotum 0.49× width of anterior margin and coarsely densely punctate, anterior two-thirds of dorsum with a few dense punctures, posteriorly with comparatively sparser and smaller punctures; lateral side ( Fig. 5 ) of pronotum ventrally with densely striate; mesoscutum anteriorly impunctate, posteriorly with dense punctures especially in the middle; scutellum densely to moderately punctate; metanotum with dense punctures, smaller than those of scutellum; dorsal surface of propodeum ( Fig. 6 ) with broad median groove containing transverse short striae, groove nail-shaped and base much wider than apex, the groove on each side distinctly margined with a carina, close to the carina with dense and variable sized punctures, and laterally with densely coarse punctures but larger and more irregular than the former, dorsum with bordering carina between horizontal and posterior surfaces; lateral surface of propodeum ( Fig. 5 ) wholly with dense and oblique striae; ventral surface of hind femur medially with obtuse and short prominence.

Metasoma. Length of T1 ( Fig. 7 ) 0.71× maximal width and anteriorly with strong transverse carina, behind the carina with dense punctures (some contiguous), largely with sparse punctures, and posteriorly with a row of minute punctures (some contiguous) forming a transverse shallow subapical groove; S1 with basally transverse depression; T2–T5 with small and sparse punctures and subapically with a row of minute punctures; S2–S5 with sparse and small punctures and punctures on lateral surface slightly larger and denser; S6 with minute punctures; T6 ( Fig. 8 ) anteriorly with moderate minute punctures, medially with sparser, deeper and larger punctures, apically impunctate and coriaceous.

Male. Unknown.

Distribution. China (Tibet, Yunnan).

Etymology. The specific name is derived from the Latin word: punctata (= punctured), referring to dorsum of propodeum and vertex anteriorly with dense punctures.

Figures

FIGURES 1–8. Hylomesa punctata sp. nov., holotype, ♀. 1. Habitus, dorsal view (CM: marginal cell; CSM I: the first sub mar- ginal cell; CSM II: the second sub marginal cell; CSM III: the third sub marginal cell); 2. Head, frontal view; 3. Vertex, dorsal view; 4. Pronotum, dorsal view; 5. Mesosoma, lateral view; 6. Propodeum, dorsal view; 7. T1, dorsal view; 8. T6, dorsal view.