Seven new species of dance flies of the subgenus Polyblepharis Bezzi, 1909 (Diptera: Empididae) from Mongolia and East Siberia Author Shamshev, I. V. text Russian Entomological Journal 2024 33 3 496 512 journal article 10.15298/rusentj.33.4.13 0132-8069 Empis ( Polyblepharis ) subhaemi Shamshev , sp.n. Figs 17–22 . TYPE MATERIAL . Holotype , ♂ labelled: Mongolia , Tsentralny / aymak [now Töv aymag (province)] sev. skl. [=northern slope] of Bogdoula near Ulan-Bator / Kerzhner 14.vii.[1]967 ( ZISP , INS _DIP_0000627). Paratypes . MONGOLIA , Töv aymag : same data as holotype ( 3 ♂♂ , 4 ♀♀ ) ; Zaysan , southern slope of Bogdo-ula Mt. , 4.vii.1967 , Zaitzev ( 2 ♀♀ ) ; northern slope of Bogdo-ula near Ulan-Bator , 22.vi.1967 , Zaitzev ( 1 ♀ ) . Arkhangai aymag [=Ara-Khangayskiy aymak (province)]: Tevshrulekh 35 km SW, 31.vii.1970 , Megmarsuryan ( 1 ♂ ) . Ömnögovi aimag [=Yuzhno-Gobiyskiy aimak (province)]: Gurban-Saykhan , 40 km S of Bulgan , 28–29.vii.1967 , Zaitzev ( 1 ♂ ) . RUSSIA , Zabaykalskiy Terr. : Kuenga River above Chernyshevsk , blooming herb meadow on a slope, 10.viii.1977 , V . Kovalev ( 1 ♂ , dissected) . DIAGNOSIS. Mid-sized species (body about 5.5 mm ); palpus yellow; mesoscutum with 3 brownish vittae, acrostichal setae biserial and presutural dorsocentrals 3-serial; legs extensively brown, femora at apex and tibiae brownish yellow. Male: eyes holoptic; wings faintly brownish infuscate; tergites 1–6 densely brownish pruinose dorsally and subshiny laterally. Female: mid and hind femora with posteroventral pennate setae; hind tibia with anterodorsal and posteroventral pennate setae. DESCRIPTION. Body length about 5.3–5.5 mm , wing 5.5–5.6 mm . Male ( Fig. 17 ). Head capsule regions mostly densely greyish pruinose; face on lower margin and entire clypeus shiny; mostly black setose. Eyes holoptic, upper ommatidia enlarged. Frons represented by very small subtriangular space just below ocellar triangle and larger space above antennae; bare. Face broad, bare. Ocellar triangle with 2 fine, moderately long and several slightly shorter setae. Occiput with numerous long setae; postoculars rather fine, moderately long on upper part and short laterally; postgena with numerous, pale, hair-like setae. Antenna with scape and pedicel brown, postpedicel and stylus black; scape slightly longer than subglobular pedicel, both with very short setulae; postpedicel nearly 2.5X as long as basal width, with straight margins; stylus nearly 1.5X as long as postpedicel basal width. Proboscis with labrum brownish yellow, nearly 1.7X longer than eye height; palpus short, yellow, with scattered black setulae. Thorax black in ground-colour, mostly densely light grey pruinose and black setose; mesoscutum rather brownish grey pruinose, with 3 indistinct, brownish vittae along acrostichal and dorsocentral setae. Antepronotum with strong setae dorsally and long, hair-like setae laterally. Postpronotal lobe with 1 long seta surrounded by short, fine, black and pale setae. Proepisternum with tuft of numerous, pale, hair-like setae on lower part. Prosternum bare. Mesonotal setae: acrostichals arranged in 2 close irregular rows, lacking on prescutellar depression, rather long (nearly as long as antennal stylus), numerous; presutural dorsocentral setae mostly arranged in 3 irregular rows (sometimes more numerous opposite postpronotal lobe), similar to acrostichals, postsuturals 1–2-serial, longer (2–3 prescutellars longest); presutural intra-alar seta undistinguishable from dorsocentrals; 1 presutural supra-alar; 3 notopleurals; 1 postsutural supra-alar; 1 long and 1 minute postalars, 4 scutellars (lateral setae only slightly shorter than apicals); in addition, pale setulae present in anterior part of notopleuron and just behind postpronotal lobe. Laterotergite with numerous pale to pale yellow setae. Anterior and posterior spiracles pale. Legs with coxae densely greyish pruinose, remaining podomeres subshiny; mostly black setose. Leg colour: extensively brown; femora brownish yellow narrowly at apex (also, sometimes mid and hind femora slightly paler near extreme base); fore and hind tibiae mostly brownish yellow (yellowish close to base), mid tibia rather uniformly yellowish. Fore coxa mostly covered with pale, hair-like setae anteriorly; with additional scattered, strong, black setae. Mid femur with whitish pilosity ventrally. Fore femur with row of minute, fine anteroventral setae; covered with hair-like, moderately long, pale setae posteroventrally and posteriorly. Fore tibia with 3–4 short, anterodorsal setae (position and robustness variable). Mid femur with complete rows of short, spine-like anteroventral and posteroventral setae. Mid tibia slender; with row of 4–5 moderately long, strong anterodorsals; 1 posterodorsal seta near middle (often absent); 2–3 short posteroventrals in apical half (position and robustness variable). Hind femur slender; 3–4 short anterodorsal setae in about apical 1/3; complete row of short, spine-like anteroventral setae; dense spinule-like setae posteroventrally. Hind tibia slightly gently thickened towards apex; with 6–7 short, anterodorsal and 3–4 similar posterodorsal setae; simple setulae ventrally; no seta in posteroapical comb. Tarsomeres of fore and mid legs slender, hind basitarsus slightly thickened at base and narrowed towards apex; basitarsi with several spine-like setae ventrally. Wing membrane faintly infuscate; entirely covered with microtrichia; veins mostly brownish (brownish yellow close to base), well-sclerotized. Veins R 5 and M 1 divergent towards wing margin; radial fork acute; R 5 meeting costa before wing apex; CuA+CuP complete (slightly weakened beyond middle). Cell dm moderately large, with strongly elongate apex; apical portion of M 4 nearly 3X longer than its middle portion. Pterostigma brownish yellow. Basal costal seta usually present, short (sometimes absent). Anal lobe well-developed; axillary incision very acute. Squama yellow, pale fringed. Halter yellow. Abdomen entirely black in ground colour. Pruinescence: tergites 1–6 densely brownish pruinose dorsally and subshiny laterally; tergites 6–7 with dark brown iridescent spot dorsally (better visible in lateral view); sternites 1–7 mostly densely greyish pruinose, tergites 2–7 faintly pruinose along posterior margin; sternite 8 faintly pruinose, subshiny posteriorly. Chaetotaxy: tergites 2–6 covered with black setulae dorsally (tergite 6 only anteriorly), tergite 7 with scattered setulae only laterally; tergites 1–3 with pale to yellowish, long, fine setae laterally, tergites 4–6 with intermixed black and pale setulae laterally; tergites 2–4 with stronger, yellowish to black posteromarginal setae laterally (long- er on tergite 2); sternite 1 bare, sternites 2–7 with very long, pale yellow, posteromarginal setae; sternite 8 only with black setae, including moderately long posteromarginals. Pregenital segments: segment 6 unmodified; tergite 7 slightly concave posteriorly, sternite 7 with slightly produced postero-lateral corner, pleuron of segment 7 slightly sclerotised posteriorly; segment 8 with separat- ed tergite and sternite; tergite 8 somewhat flattened, represented by two subtriangular sclerites separated mid-dorsally, with several short setae posteriorly; sternite 8 large, scoop-shaped, somewhat constricted anteriorly, with 2 small, antero-lateral, rounded projections separated by depression and similar projection on posterior margin of depression. Hypopygium ( Figs 18–21 ) moderately large; epandrium brown, cerci yellowish brown; epandrial lamella with short, rather sparse setae along lower margin and near apex; cercus covered with black setulae. Epandrium entirely broadly divid- ed (epandrial bridge absent); epandrial lamella ( Fig. 18 ) subtriangular (lateral view). Hypandrium ( Fig. 19 ) separated from epandrium; mostly membranous, undivided, narrowly sclerotized along margin, rather subtriangular in ventral view (broad apically); bare; gonocoxal apodeme small. Cerci ( Fig. 20 ) separated with each other and from epandrium; cercus elongate ovate (lateral view), with apex extending to level of epandrial lamella apex, without lobe-like, dorsolateral projection at basal part (dorsal view), with serrate inner margin. Phallus ( Fig. 21 ) almost entirely hidden; zigzag bent, strongly constricted beyond middle; its basal portion gently curved, thick at base and becoming slightly narrower towards constriction; apical bend portion broadly semicircular (its tip pointing to rear), long, almost uniformly slender (except slightly thickened extreme base). Ejaculatory apodeme moderately large, extended far beyond basal curvature of phallus, with lateral wings. Female ( Fig. 22 ). Similar to male except as follows. Eyes dichoptic, ommatidia of equal size. Frons broad, parallel-sided, with marginal setulae. Occiput with sparser and somewhat stronger setae; also, ocellar setae slightly stronger. Proboscis with labrum nearly 2X longer than eye height. Thorax with shorter setae; acrostichals and dorsocentrals very short; laterotergite mostly with yellow setae, usually with some number of additional black setae (variable, sometimes setae entirely yellow). Fore femur covered with simple, short setulae. Fore tibia with 4–5 short, anterodorsal setae (position and robustness variable) and 1–2 short posteroventral setae near middle. Mid femur without whitish pilosity ventrally; with fine, very short anteroventral and posteroventral setae; bearing fringe of pennate, posteroventral setae (moderately long in about apical 1/3, becoming gradually shorter towards base and absent in about basal 1/4 of femur). Mid tibia slender; dorsal setae as in male, in addition with 3–4 anteroventral and 3–4 posteroventral setae (position and robustness variable). Hind femur slender; with scattered short setae in apical 2/3; bearing pennate posteroventral setae in about apical 2/3 (longer towards apex). Hind tibia bearing fringe of short, pennate, almost uniform, anterodorsal setae (absent near extreme base and close to apex of tibia) and similar, pennate, posteroventral setae in about apical 1/3; in addition, with row of 5–6 short, strong, anterodorsal setae situated just before pennate setae, 1–2 posterodorsal seta(e) in middle part (sometimes absent) and 3–4 short anteroventral setae (slightly shorter than anterodorsals). Wing almost hyaline. Abdomen with tergites 1–6 entirely densely greyish pruinose, tergites 7–8 shiny; covered with mostly minute setulae, only tergites 1–2 with somewhat longer setae laterally, no posteromarginal setae. Sternites 2–6 entirely densely greyish pruinose, with scattered, very short setae; sternite 7 faintly pruinose. Cercus brown, subglobular, covered with dense, pale, erect setulae. DIFFERENTIAL DIAGNOSIS. The new species is similar to E . haemi Loew, 1862 known from Bulgaria and Turkey [ Chvála, 1999 ;Çiftçi, Hasbelni, 2007]. However, E . haemi is larger (body 8–9 mm ) and has longer proboscis (labrum nearly 3X longer than head height). In addition, in the female of E . haemi the hind basitarsus bears pennate setae. ETYMOLOGY. The specific name refers to the similarity of the new species to E . haemi Loew. DISTRIBUTION. Mongolia , Russia (Zabaykalskiy Territory).