Stenomesius hani, Fan & Li, 2021

Fan, Jun-Jie & Li, Cheng-De, 2021, Three new species of Stenomesius Westwood (Hymenoptera, Eulophidae) from China, with a key to Chinese species, ZooKeys 1062, pp. 1-10: 1

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Stenomesius hani

sp. nov.

Stenomesius hani   sp. nov.

Figures 7-12 View Figures 7–12

Type material.

Holotype, ♀ [NEFU; on card], China, Heilongjiang Province, Mudanjiang City, Heixiazigou, 26-28.VIII.2015, Hui Geng, Yan Gao and Zhi-Guang Wu, by yellow pan trapping.

Paratype: 1♀ [on slide], China, Heilongjiang Province, Shangzhi City, Maoershan, 18.V.2018, Guang-Xin Wang, Ming-Rui Li and Ye Sai, by sweeping.


Lower face yellow; upper face dark brown except lower most about 1/6 yellow; vertex dark brown with 2 triangular, yellow spots; antenna inserted at middle of the face; scape yellow, with about apical half of dorsal surface brown; mesoscutum with anterior half black and posterior half yellow; midlobe of mesoscutum with 3 pairs of long setae; scutellar-axillar complex dark brown, metanotum black; propodeum yellowish brown.


Female. Length 1.7-1.9 mm. Lower face yellow; upper face dark brown except lower 1/6 yellow; vertex dark brown with a triangular, yellow spots at each side; scape yellow with about apical half of dorsal surface brown, pedicel and flagellum black; mandibles yellow, with teeth brown; gena yellow; occiput mostly dark brown. Pronotum yellow, with a dark brown spot in the middle; mesoscutum with anterior half black and posterior half yellow; axillae and scutellum dark brown; dorsellum and lateral panels black; propodeum brownish; Petiole dark brown; gaster mainly yellowish-brown, with anterior half of lateral margins dark brown, T3-5 each with a transverse dark brown stripe; ovipositor black. wings hyaline with veins pale brownish yellow; legs yellow, with claws brown.

Head (Fig. 9 View Figures 7–12 ) 1.4 × as wide as high in frontal view and 2.2 × as wide as long in dorsal view; frons smooth and shiny with a row of setae around eye margins; vertex smooth with scattered setae; POL 1.4 × OOL; eyes with sparse, short pubescence; malar sulcus present, shallow; malar space 0.38 × eye height; occiput with dense setae. Antenna (Fig. 10 View Figures 7–12 ) inserted at middle of the face; scape exceeding level of vertex. Relative measurements (length : width): scape = 57: 8; pedicel = 16: 9; F1 = 26: 9; F2 = 27: 8; F3 = 27: 8; F4 = 27: 8; clava = 37: 10 (excluding terminal spine).

Mesosoma (Fig. 7 View Figures 7–12 ). Pronotum with a row of setae along anterior margin and 2 long, pale yellow setae medially along posterior margin; mesoscutum and axillae finely reticulate; midlobe of mesoscutum with 3 pairs of long setae; axillae well separated from each other; scutellum distinctly reticulate, with 2 pairs of long setae; sublateral grooves uniting posteriorly; propodeum smooth, with plicae and H-shaped carina; each propodeal callus with 7 long setae; forewing (Fig. 11 View Figures 7–12 ) 2.7 × as long as wide; speculum absent; hind wing (Fig. 12 View Figures 7–12 ) 7.2 × as long as wide; metatibial spurs about as long as corresponding basitarsomere. Relative measurements (length): SMV = 21; MV = 19; PMV = 7; STV = 5.

Metasoma (Fig. 7 View Figures 7–12 ). Petiole rugose, short, transverse; gaster ovate, 1.7 × as long as wide and 1.1 × as long as mesosoma; ovipositor exserted at apex of gaster.

Male. Unknown.




China (Heilongjiang).


The species is named for Prof. Hui-Lin Han of the Northeast Forestry University, Harbin, China.


Stenomesius hani   is similar to S. anati   Khan & Singh in sharing: antenna inserted in middle of face; face with dark brown infuscation above antennal torulus; anterior half of mesoscutum, scutellum, and axillae with dark brown infuscation. Stenomesius hani   can be separated from the latter by the following combination of characters: scutellum with 2 pairs of setae (3 pairs in S. anati   ); distal 1/3 costal cell with setae (whole costal cell with setae in S. anati   ); gaster 1.1 × as long as mesosoma (shorter than mesosoma in S. anati   ).