The long-legged flies (Diptera: Dolichopodidae) from Kurile Islands, with description of a new species of the genus Sciapus Zeller, 1842 Author Grichanov, I. Ya. Author Selivanova, O. O. text Far Eastern Entomologist 2022 2022-01-09 445 7 24 http://dx.doi.org/10.25221/fee.445.2 journal article 10.25221/fee.445.2 2713-2196 7166752 D853061A-FE2B-4418-AAE7-7019371DBA6E Key to East Palaearctic species of the genus Sciapus (males) 1. Tarsi with one or more segments enlarged (often slightly) …............................................. 2 – All tarsi simple, at most some segments with erect setulae, or elongated, or sometimes 5th segment flattened dorsoventrally and slightly broadened …............................................. 5 2. Mid tarsus with 3rd segment not enlarged, and 4th segment slightly enlarged; fore tarsus simple; body length 5.5–5.8 mm (Primorye) …................................................................. ................................................................. S . dytei Negrobov, Maslova et Selivanova, 2012 – Mid tarsus simple; fore tarsus with 4th segment bearing dorsal lobe …............................... 3 3. Acrostichals present; wing vein dm-m straight; body length 7.9–8.1 mm (Primorye, Sakhalin ) …............................................................. S . paradoxus Negrobov et Shamshev, 1986 – Acrostichals absent; wing vein dm-m strongly convex ….................................................... 4 4. Epandrial lobe much longer than epandrium, bearing long hairs; antennal pedicel with pale bristles; hind basitarsus much longer than next segment; body length 5.0–8.0 mm (TransPalaearctic) …....................................................................... S . nervosus (Lehmann, 1822) – Epandrial lobe shorter than epandrium, sparsely ciliated; antennal pedicel with dark bristles; body length 6.0 mm (Amurian Region, Primorye) …...................... S . roderi Parent, 1929 5. Frons, mesonotum and abdomen entirely shining green, only very feebly dusted; cerci mostly fused, each cercus with long free distal projection; organ X (ventral cercal projection) reduced ….......................................................................................................................... 6 – Frons, thorax and abdomen not shining, densely pollinose, sometimes with shining spots or stripes; cerci fused, organ X large …................................................................................. 7 6. Distoventral projection of cercus with short simple setae; surstylus with simple setae at apex; body length 4.7–4.9 mm (Primorye) …..................................................................... ....................................................................... S . incognitus Negrobov et Shamshev, 1986 – Distoventral projection of cercus with ventral fringe of strong flattened bristles and 1 long undulate flattened apical seta; ventral process of surstylus with 2 long undulate flattened apical setae; body length 5.0 mm (Kunashir) ….................................. S . basarukini sp. n. 7. Abdomen entirely dark, rarely with yellow-brown spots laterally at base; body length 4.8 mm ( Buryatia , Chita, Irkutsk , Primorye) …...... S . sibiricus Negrobov et Shamshev, 1986 – Abdominal segments 1-4 at least partly yellow .................................................................... 8 8. Lobes of organ X bifurcate, with short apical setae; body length 5.0 mm ( Gansu, Inner Mongolia ) …..................................................................................... S . flexicornis Parent, 1944 – Lobes of organ X fused to apex, thin and beaked at apex, with curved dorsally distal process; with uninterrupted row of ventral setae decreasing in length towards apex; fore and mid tarsi covered with erect setulae; body length 3.6 mm (Yakutia) …................................... .......................................................................... S . vladimiri Grichanov et Negrobov, 2014