A taxonomic review of the genus Exochus Gravenhorst (Hymenoptera: Ichneumonidae: Metopiinae) from South Korea with descriptions of ten new species Author Choi, Jin-Kyung Department of Life Sciences, Yeungnam University, Gyeongsan, South Korea; Author Kolarov, Janko Faculty of Pedagogy, University of Plovdiv, Plovdiv, Bulgaria Author Lee, Jong-Wook Department of Life Sciences, Yeungnam University, Gyeongsan, South Korea; text Journal of Natural History 2016 2016-05-31 50 2327 2367 http://dx.doi.org/10.1080/00222933.2016.1197335 journal article 21247 10.1080/00222933.2016.1197335 9e8a020a-c322-48a0-935d-ae3ff9c1f1c2 1464-5262 3993034 B28700A7-9CA7-4AE7-9816-9C8F4CD46160 Exochus argutus Tolkanitz, 1993 ( Figures 4a , 7a ) Exochus argutus Tolkanitz, 1993: 106 – 120 . Type : male; Type depository: SIZ. Figure 4. Head in frontal view. (a) Exochus argutus ; (b) Exochus britannicus ; (c) Exochus consimilis ; (d) Exochus destitutus ; (e) Exochus flavomarginatus ; (f) Exochus frontellus ; (g) Exochus gratus ; (h) Exochus gravipes ; (i) Exochus guttatus ; (j) Exochus lictor ; (k) Exochus lineifrons ; (l) Exochus mitratus . Scale bar = 0.2 m m. Specimens examined ( South Korea ) 1 male , GN Gajisan, 28 June 1989 , J.G. Kim. Diagnosis Male. Body length 9.0 mm. Antenna with 38 flagellomeres. Head strongly convex, upper face with projection ( Figure 4a ); between antennal sockets with vertical ridge; dorsal margin of eyes with triangular yellow spots. Malar space black. Pronotum glabrous except sub-upper area, strongly sunken; epomia absent. Scutellum and postscutellum black. Propodeum with area superomedia ( Figure 7a ); area externa with hair; area superomedia and area dentipara with sparse hairs; spiracle of propodeum oval; metapleuron glabrous. Vein cu-a of hindwing intercepted at lower 0.3, with vein Cu1. Tergite 1 with distinct dorsal longitudinal carina, reach central area of tergite 1, weak up-curve in basal area, median area of tergite 1 without hair. Tergite 3 with epipleuron wedge-shaped, the basal part straight or weakly convex. Distribution South Korea (new record), Belarus , Mongolia , Russia , Ukraine .