A taxonomic revision of the genus Xylota Meigen (Diptera: Syrphidae) in Korea Author Jeong, Soo-Hyun Author Han, Ho-Yeon text Zootaxa 2019 2019-08-29 4661 3 457 493 journal article 25863 10.11646/zootaxa.4661.3.3 81a32fc3-9362-4ec2-b507-54859001f1e0 1175-5326 3446340 28EFDB26-4C37-4DA9-ABBB-122083EE396B Xylota atricoloris Mutin (Korean name: geom-eun-heo-ri-kkot-deung-e) Figs 1E , 2E , 3 K–O, 9A–D, 13C Species new to Korea Xylota atricoloris Mutin, 1988a: 102 , 1988b: 119 (type locality: Russia , Khabarovskii, Krai, Komsomolskii Zapovednik, the mouth of Gorin River; holotype ♂ , ZISP); Mutin & Barkalov, 1999: 494 (in Russian Far East key). Diagnosis. This black species can be distinguished from the other Korean Xylota species by the combination of the following characters: 1) almost parallel-sided or slightly ovated abdomen ( Fig. 2E ); 2) brown pro- and mesotarsomeres 1–3 in dorsal view; 3) dark brown to black metatarsus ( Fig. 3L ); and 4) metatrochanter ventrally with short calcar (subequal to basal width) ( Fig. 3L ). Description of Korean material. MALE . Body length 10.5–11.6mm ; wing length 8.0–9.0mm. Head black; face with dense yellowish white pollinosity; posterior 1/5 of frons anterior to eye contiguity with yellowish white pollinosity ( Fig. 1E ); area anterior to ocellar triangle (vertical triangle anterior to ocellar triangle) bare but posterior area covered with yellow pile ( Fig. 1E ). Thorax entirely black ( Fig. 3K ); scutum subshiny with short appressed yellow pile, but posterior half sparsely with longer erect yellow pile mixed with short pile; anterior anepisternum covered with white pollinosity; posterior anepisternum with yellowish white pile and dense white pollinosity; anepimeron covered with yellow pile; katepisternum moderately covered with white pollinosity, dorsal posterior area with white pile; notopleuron with yellow pile; scutal area anterior to wing base with black and dark brown pile; postalar callus mainly with long yellow pile but anterior portion with few black pile; metasternum bare with white pollinosity. Wing hyaline with pale brownish tinge except for brown pterostigma ( Fig. 3M ); halter with basal half of stem dark brown but posterior stem and knob yellow. Legs: femora dark brown to black; pro- and mesotibiae yellow with small dorso-basal yellowish brown area; pro- and mesotarsomeres 1–3 ventrally yellow but dorsally brown; tarsomeres 4 and 5 black; metatrochanter ventrally with short calcar (subequal to basal width) ( Fig. 3L ); apico-ventral 1/3 of metafemur with two carinae covered with spinose setae, remaining ventral area with irregularly scattered spinose setae mixed with smaller setae, antero-dorsally and postero-ventrally with long white pile, apico- dorsal 1/3 area with black setulae; metatibia dark brown with basal 1/5 yellow ( Fig. 3L ); metatarsomeres 1–3 dark brown, tarsomeres 4 and 5 black ( Fig. 3L ). Abdomen about 3x longer than wide ( Figs 2E , 3K ), terga 2 and 3 almost parallel-sided or slightly ovated, pair of lateral facing triangular areas densely covered with white erect pile (other areas of terga with short appressed black and pale yellow pile mixed) ( Fig. 2E ). Male genitalia ( Figs 9 A–D, 13C): surstylus with dorsal lobe twice as long as ventral lobe, long finger shaped and slightly bent ventrally in lateral view, densly covered with spinose setulae ( Fig. 9 A–C); ventral lobe of surstylus widely bulged, apically with setulae ( Fig. 9 A–C); cercus cordated in profile with long pale pile ( Fig. 9 A–C); lingula indistinct ( Fig. 13C ); fenestra round in outline ( Fig. 9B, C ); spur of superior lobe reduced ( Fig. 13C ); superior lobe asymmetrical ( Fig. 9 A–C); right lateral arm of theca ( Fig. 9C ) with baso-dorsal thorny process and apico-dorsal 4 toothed process, with 3 pale pile in between these two processes; left lateral arm of theca ( Fig. 9B ) similar but apico-dorsal process much narrow; aedeagus with ejaculatory hood medially with furrow in postero-ventral view, dorsally round ( Fig. 9D ); ejaculatory process short ( Fig. 9D ); ejaculatory apodeme apically enlarged in bowl shape. FIGURE 3. Leg, head and body of Xylota species. A–E . X. abiens : (A dorsal view, C antero-lateral view) male body; (B) male left metafemur, anterior view; (D dorsal view, E antero-lateral view) male head. 3F–J . X. amaculata : (F, H) male body; (G) male left metafemur, anterior view; (I, J) male head. 3K–O . X. atricoloris : (K, M) male body; (L) female left metafemur, anterior view; (N, O) male head. FEMALE. Not examined. According to the original description, female frons anteriorly bare and posteriorly with short white pile except for light triangular pollinosity macula close to eyes (Mutin, 1988). Material examined. SOUTH KOREA : Gangwon-do : 1♂ , Wonju-si , Heungeop-myeon , Maeji-ri , Yonsei Univ. Wonju Campus , 24.IV.2004 , H.W. Byun ; 1♂ , ditto, 28.IV.2004 , H.W. Byun , O.Y. Lim , H.S. Lee ; 2♂ , ditto, 24.V.2009 , D.J. Cha , H.S. Lee ; 1♂ , ditto, 26.V.2009 , S.W. Suk , J.M. Jung . Distribution. Korea (new record), Russian Far East. Remarks. The Korean specimens agree with the original description as well as the associated illustration of right lateral view of the male genitalia by Mutin (1988).