Utetes aharmus Tan & van Achterberg, 2018

Utetes aharmus Tan & van Achterberg , sp. n.

( Figs 1–13 View FIGURE1 View FIGURES 2–13 )

Type material. Holotype, ♀ ( NWUX) “NW China: Shaanxi, Qinling Mts., Guanghuojie, c. 100 m, 27.vi.2013, Jiangli Tan , NWUX”. Paratypes: 1 ♀ ( RMNH), “NW China: Shaanxi, Liping Nat. For. P., betw[een] Hongchenxia– Shicheng, c. 1490 m, 21.vi.2015, 32°47’N 106°40´E, JL Tan ” GoogleMaps ; 1 ♀ ( NWUX) “NW China: Shaanxi, Pingheiliang, Ningshaan, N33.47° E108.50°, 17.viii.–1.x.2016, 2188 m, b[lack] Mal. trap, Tan JL & Tan QQ GoogleMaps , NWUX”.

Comperative diagnosis. The new species runs in Tobias (1998) to Opius [= Utetes ] rotundiventris Thomson, 1895 ; but U. rotundiventris has the flat lateral areas of the first metasomal tergite narrow, tergite nearly parallel– sided, with longitudinal sculpture and 1.5–1.8 × as long as its apical width (flat lateral areas wide, tergite slightly widened apically, with irregular rugae and 1.3–1.4 × in U. aharmus ; Fig. 5 View FIGURES 2–13 ), antennomeres of ♀ with short setae (with long setae; Figs 6–8 View FIGURES 2–13 ), malar space about as long as basal width of mandible (0.5–0.7 ×), pronotal side anteromedially weakly crenulate (coarsely crenulate; Fig. 3 View FIGURES 2–13 ), scutellum flat (somewhat to distinctly protruding above level of mesoscutum; Fig. 4 View FIGURES 2–13 ), body length 2.0– 2.5 mm (2.9–4.0 mm) and hind femur about 5 × wider than long (4.2–4.5 ×; Fig. 11 View FIGURES 2–13 ).

Description. Holotype, ♀, length of body 2.9 mm, of fore wing 3.4 mm.

Head. Antenna with 35 antennomeres and 1.3 × as long as fore wing, antennomeres with long setae; third antennomere 1.2 × as long as fourth antennomere, length of third, fourth and penultimate antennomeres 2.8, 2.1 and 1.9 × their width, respectively ( Figs 6–8 View FIGURES 2–13 ); length of maxillary palp 1.1 × height of head; labial palp segments slender; occipital carina far separated from hypostomal carina and carina dorsally widely absent; hypostomal carina rather wide; length of eye in dorsal view 2.4 × temple ( Fig. 10 View FIGURES 2–13 ); frons shallowly depressed behind scapus, smooth and glabrous; face finely and remotely punctate, 1.6 × wider than high medially, medially elevated ( Fig. 9 View FIGURES 2–13 ) and connected to median elevation of frons; width of clypeus 2.7 × its maximum height and 0.6 × width of face; clypeus moderately convex, with some coarse punctures and with long ventral setae, slightly protruding and thin ventrally ( Fig. 9 View FIGURES 2–13 ); hypoclypeal depression wide ( Fig. 9 View FIGURES 2–13 ); malar suture present as obsolescent depression (in paratype distinctly impressed); length of malar space 0.5 × basal width of mandible and malar space weakly convex; mandible triangular, robust apically, basal half regularly widened and with medium–sized ventral carina ( Fig. 13 View FIGURES 2–13 ).

Mesosoma. Length of mesosoma 1.3 × its height; dorsal pronope large, narrow elliptical ( Fig. 4 View FIGURES 2–13 ); pronotal side antero-medially and posteriorly coarsely crenulate and remainder smooth; epicnemial area largely smooth; precoxal sulcus medium-sized and distinctly crenulate, remaining far from anterior and posterior margins of mesopleuron; remainder of mesopleuron convex, strongly shiny and smooth; pleural sulcus smooth; only ventral half of anterior groove of metapleuron crenulated ( Fig. 3 View FIGURES 2–13 ); notauli absent on disc, only anteriorly deeply impressed and largely smooth (but rugose anteriorly) and no lateral carina in front of tegulae; mesoscutum rounded anteriorly (without “shoulders”), strongly shiny and largely glabrous ( Fig. 4 View FIGURES 2–13 ); its medio-posterior depression deep, wide droplet–shaped; scutellar sulcus rather wide and finely crenulate; scutellum slightly protruding above level of mesoscutum medially, smooth and largely glabrous (but laterally setose) ( Fig. 4 View FIGURES 2–13 ); propodeum with short medio– longitudinal carina connected to sinuate transverse carina and remainder rather coarsely rugose ( Figs 4, 5 View FIGURES 2–13 ).

Wings. Fore wing ( Fig. 2 View FIGURES 2–13 ): pterostigma triangular; 1-R1 ending at wing apex and 1.4 × as long as pterostigma; r:3-SR:SR1 = 5:32:62; 2-SR:3-SR:r–m = 23:32:11; r widened ; 1-M curved and 1-SR 0.4 × as long as 1-M; SR1 slightly curved; m-cu and cu-a weakly postfurcal; first subdiscal cell closed, CU1b long; apical 0.2 of M+CU1 sclerotized. Hind wing ( Fig. 2 View FIGURES 2–13 ): M+CU:1–M:1r-m = 24:20:13; cu-a straight; m-cu completely absent.

Legs. Length of femur, tibia and basitarsus of hind leg 4.5, 8.5 and 4.6 × as long as wide, respectively; hind femur and tibia with long setae ( Fig. 11 View FIGURES 2–13 ); carinula of hind tibia long and curved ( Fig. 12 View FIGURES 2–13 ).

Metasoma. Length of first tergite 1.4 × its apical width, medially its surface distinctly convex and irregularly rugose, and with separate dorsal carinae, apical half slightly widened ( Fig. 5 View FIGURES 2–13 ); second tergite smooth, with pair of wide triangular basal depressions; following tergites smooth; length of setose part of ovipositor sheath 0.05 × fore wing and 0.2 × hind tibia ( Fig. 11 View FIGURES 2–13 ); ovipositor rather slender ( Figs 11, 12 View FIGURES 2–13 ).

Colour. Body black; palpi ivory; legs (but hind tibia brownish apically), scapus and pedicellus ventrally, mandible (except dark brown teeth) and tegulae yellow; head anteriorly, orbita, second tergite and base of third tergite yellowish brown or yellow; metasoma (except first and second tergites) dark brown, but ventro–basally pale brown; wing membrane subhyaline; pterostigma and most veins brown.

Variation. Length of body 2.9–4.0 mm, of fore wing 3.4–4.2 mm; antennomeres of ♀ 32–33(1), 35(1) or 39(1), face 1.6–1.8 × wider than high medially; length of first tergite 1.3–1.4 × its apical width, length of setose part of ovipositor sheath 0.05–0.06 × fore wing and 0.2–0.3 × hind tibia; pronotal side posteriorly coarsely crenulate or crenulae reduced; length of malar space 0.5–0.7 × basal width of mandible and malar space with shallow impression or with distinct malar suture; hind femur 4.2–4.5 × wider than long; face (except orbita), second and third tergites yellowish brown or dark brown.

Distribution. China ( Shaanxi).

Biology. Unknown.

Etymology. From “a” (Greek for “not”) and “harmos” (Greek for “shoulder”) because of lacking protruding shoulders.