Diplonevra hirsuta Michailovskaya, 2000

(Figs. 1K, 1L, 4J–L, 5F, 6H, 6I, 8G, 8H)

Diplonevra hirsuta Michailovskaya, 2000: 3 . Type locality: Ussuryisk, Russia.

Diplonevra lamella Liu & Yang, 2016: 40 . Type locality: Henan, China (syn. nov.).

Diagnosis. This species can be distinguished from other Diplonevra species by the combination of the following characteristics: inner face of male hind trochanter with four long, sinuate setae arranged in longitudinal row on median area, and 2–4 shorter, pointed setae on ventral margin; ventrobasal area of inner face of male hind femur with long ascending process bearing two robust, blunt setae (upper one short, peg-like, while lower one long, spatulate) at tip; hind tibia with two dorsal longitudinal setal palisades and 2 or 3 anteroventral short setae; hypopygium nearly globose.

Description. Male. Body length 2.22–2.87mm (n=7). Head (Fig. 1K). Frons blackish to dark brown, shiny. Flagellomere 1 yellowish brown, as large as one-third of compound eye, subglobose, slightly pointed apically. Arista yellowish brown. Palpus yellowish brown, as wide as maximum width of flagellomere 1, with 6 or 7 bristles (mostly 6) apically and some short hairs ventrally. Labrum and labella pale yellow. Thorax (Fig. 1L). Scutum and scutellum blackish to dark brown. Posterior margin of scutum with 1 or 2 pairs of long prescutellar bristles (mostly one pair, outermost pair always present). Scutellum with two pairs of long bristles of subequal length; anterior scutellar bristles convergent; posterior scutellar bristles convergent and sometimes apically crossing each other. Pleuron (Fig. 1K) brown. Legs (Fig. 1K) brown to dark brown except fore, mid-tibiae and tarsi yellowish brown. Fore tibia with single strong dorsal seta on basal half and one row of dorsal short setulae on apical half. Midtibia (Fig. 4J) with two dorsal longitudinal setal palisades; anterodorsal one extending two-thirds of midtibial length while posterodorsal one extending entire length of midtibia. Two dorsal midtibial bristles on basal half protruding at different point each; anterodorsal one at basal one-fifth, posterodorsal one at basal one-ninth of midtibia. Inner face of hind trochanter (Fig. 6H, I) with four long, sinuate setae arranged in longitudinal row on median area, and 2–4 shorter, pointed setae on ventral margin. Ventrobasal area of inner face of hind femur (Fig. 6H, I) with long ascending process; anterior margin lamellar, apex with two robust, blunt setae (upper one short, peg-like, while lower one long, spatulate) protruding perpendicularly. Hind tibia (Fig. 4K, L) with two dorsal longitudinal setal palisades, 2 or 3 anteroventral short setae, and one row of posterodorsal fine setae. Wing (Fig. 5F). 1.62–2.26mm long (n=7). Costal index 0.45–0.47. Mean costal ratio 6.4:1.0:1; range 5.3–7.0:1.0–1.1:1. Costal setae of costal section III 0.03–0.05mm long. Vein of costal sections II–III slightly thickened. Base of Rs with single short hair. Vein M 1 slightly curved, weakly recurved apically. Vein brown and membrane hyaline with pale brown tinge. 3–5 (mostly 4) alular setae present, 0.08–0.14mm long. Halter dark brown. Abdomen (Fig. 1K, L). Tergites dark brown. Venter of abdomen grayish brown. Hypopygium (Fig. 8G, H) nearly globose, dark brown but epandrium brighter, shiny. Epandrium bare dorsally. Left side of epandrium (Fig. 8G) with finger-shaped epandrial lobe, bearing some hairs and one long apical seta. Right side of epandrium (Fig. 8H) extended posteroventrally, with several long, fine hairs on posterior margin and minute, hooked lobe curved inward on posteroventral corner. Hypandrium tomentose. Left plate of hypandrium (Fig. 8G) with rounded posterior margin. Right plate of hypandrium (Fig. 8H) with curved posterior margin. Cercus with one pair of pale yellow sclerites mounted dorsally on brown stalk; length of cercus about four times as long as maximum width of cercus; stalk with numerous hairs of similar length on surface.

Female. Unknown from Korea.

Specimens examined. South Korea: 2♂, Gyeonggi-do, Uijeongbu-si, Millak-dong, near Mt. Soribong, 37°45′02″N, 127°08′33″E, 15.vii.2014, Malaise trap, KNA leg. (NIBR) ; 1♂, Gyeonggi-do, Pocheon-si, Soheul-eup, Korea National Arboretum, 37°45′39″N, 127°09′37″E, 30.ix.2014, Malaise trap, KNA leg. (KNU) ; 1♂, Gangwondo, Chuncheon-si, Dongnae-myeon, Geodu-ri, Mt. Daeryongsan, 37°51′08″N, 127°48′22.2″E, 5–19.vii.2019, Malaise trap, J. H. Lee leg. (KNU) ; 1♂, Gangwon-do, Inje-gun, Buk-myeon, Hangye-ri, 38°08′46.5″N, 128°15′47.5″E, 28.viii–1.x.2019, Malaise trap, D. Y. Park leg. (KNU) ; 1♂, Jeollabuk-do, Wanju-gun, Dongsang-myeon, Sinwol-ri, near Dongsang Reservoir, 35°57′31.8″N, 127°17′45.1″E, 26.vi–13.viii.2020, Malaise trap, J. H. Sohn et al. leg. (KNU) ; 1♂, Jeollabuk-do, Jeongeup-si, Sintaein-eup, Yeonjeong-ri, 35°41′56.1″N, 126°53′47.3″E, 8–22.ix.2020, Malaise trap, J. H. Sohn et al. leg. (KNU) .

Ecology. Ecological information for the species is largely unknown.

Remarks. Diplonvera lamella Liu & Yang (2016) is considered a junior synonym of D. hirsuta on the basis of the hind leg character and hypopygium.

Distribution. Korea (new record, Gyeonggi-do, Gangwon-do, Jeollabuk-do), Russia (Far East), China.