Exochus frontellus Holmgren, 1858

Choi, Jin-Kyung, Kolarov, Janko & Lee, Jong-Wook, 2016, A taxonomic review of the genus Exochus Gravenhorst (Hymenoptera: Ichneumonidae: Metopiinae) from South Korea with descriptions of ten new species, Journal of Natural History 50, pp. 2327-2367 : 2349-2350

Exochus frontellus Holmgren, 1858

( Figures 4f , 7f )

Exochus frontellus Holmgren, 1858: 305 – 394 . Type: unknown; Type depository: unknown. Exochus shimamatsensis Kusigemati, 1971: 205 – 298 . Type: female; Type depository: HU.

Specimens examined

( South Korea) 1 female, GG, Anyang-si, Naman-gu, Gwanak, 5 – 19 July 2007, J.O. Lim; 1 female, GB, Andong-si, Imdong-myeon, Gocheon-ri, Aegisan, 16 August 1997, J.W. Lee; 1 female, CB, Cheongwon-si, Miwon-myeon, Miwon-ri, 9 – 16 September 2008, J .H. Han.

Diagnosis

Female. Forewing 3.5 mm, body 4.5 mm long.

Face, mandible and malar space yellow ( Figure 4f ). Vertex with large triangular yellow marks. Yellow triangular marks and yellow inner orbits confluent. Antenna with 21 flagellomeres; ventral part of antenna yellowish brown and dorsal part of antenna dark blackish brown. Mesosoma black. Upper margin of pronotum and mesopleuron yellow. Scutellum flat and black. Propodeum with lateromedian longitudinal carinae and costula; area basalis and area superomedia separated by carina ( Figure 7f ). Legs yellow except hind coxa reddish brown. Vein Cu-a of forewing distad of vein Rs+M. Vein 2 rs-m shorter than vein between 2 rs-m and 2 m-cu. Vein cu-a of hindwing intercepted at lower part, vein Cu1 of hindwing vestigial. Area between median longitudinal carinae of tergite 1 glabrous. Tergite 2 finely punctate. Epipleuron of third metasomal tergite semicircular.

Distribution

South Korea (new record), Austria, Germany, Hungary, Japan, Romania, Russia, Sweden, Ukraine, United Kingdom.

Figures

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.

Figure 7. Propodeum in dorsal 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.