Exochus gratus Tolkanitz, 2003

Varga, Oleksandr, 2021, Types of the genus Exochus Gravenhorst, 1829 (Hymenoptera: Ichneumonidae Metopiinae) deposited at the Schmalhausen Institute of Zoology of National Academy of Sciences of Ukraine, Zootaxa 4985 (2), pp. 173-193 : 180

Exochus gratus Tolkanitz, 2003

( Fig. 7 )

Material examined. Holotype: female, RUSSIA, Sakhalin Region: Novo-Aleksandrovsk , 17.vii.1986, leg. M. Nesterov (deposited in: SIZK).

Diagnosis. Exochus gratus is characterized by the combination of the following characters: face not strongly swollen, black with a yellow line along apical margin; frons along eye orbits yellow (not reaching the level of the apical ocellus); yellow marks opposite to lateral ocelli not elongated; clypeus with apical margin straight; occipital carina absent dorsally; meso- and metasoma black except upper hind corner of pronotum and subtegular ridge yellow; propodeum with area superomedia closed apically, costulae absent; fore wing with vein cu-a strongly distad of Rs&M by about 0.4 of own length; third laterotergite more-or-less rounded from the proximal end; legs generally orange-yellowish, hind tibia whitish centrally, fuscous basally and apically.

Distribution. Currently known only from the Sakhalin Island of Russia ( Tolkanitz 2007a).

Remarks. According to Yu et al. (2016) the holotype of this species is deposited at the Zoological Institute of RAS, but actually it is in Kyiv which is metioned in Zerova et al. (2006). This species is placed in a group of species with whitish basally hind tibia in the key of Tolkanitz (2007a) (couplet 161). After examination of the holotype it was found that hind tibia basally narrowly fuscous.

Figures

FIGURE 7. Exochus gratus Tolkanitz, 2003, holotype female: a) type label; b) lateral view of habitus; c) third laterotergite; d) frontal view of head; e) dorsal view of propodeum.