Aphidius areolatus Ashmead, 1906

Fig. 5A-G

Aphidius areolatus Ashmead, 1906; Starý and Schlinger 1967; Chang and Youn 1983; Starý and Choi 2000.

Redescription.

Female. Length of body 2.93 mm (Fig. 5A). Length of fore wing 2.63 mm (Fig. 5B).

Head. Tentorial index 0.35-0.39 (Fig. 5D). Malar space 0.27-0.30 times longitudinal eye diameter. Antenna 14-segmented, thickened at apex with short antennal segments (Fig. 5C). F1 slightly longer than F2. F1 and F2 2.12-2.14 and 1.63-1.76 times as long as their width at the middle, respectively. Maxillary palp with four palpomeres, labial palp with three palpomeres. Ratio of eye to temple in dorsal view 1.42. Face width/height ratio 1.46-1.57 (Fig. 5D).

Mesosoma. Propodeum areolated, areola length/width ratio ca. 1.53 (Fig. 5E). Pterostigma 3.61 times as long as wide. Ratio of pterostigma length to R1 vein length ca. 1.14 (Fig. 5B).

Metasoma. Petiole 2.17 times as long as wide at spiracles (Fig. 5F, G), with about 10 straight costulae in anterolateral area (Fig. 5G).

Colour. Antenna black. Head black. Face with clypeus black, mouth parts light-brown. Mesoscutum and metasoma black, except for brown petiole. Legs brown with dark apices.

Male. Antenna 19-20-segmented. Maxillary palp with four palpomeres, labial palp with three palpomeres.

Specimens examined.

Korea, 2 ♀, 6 ♂; Korean National Arboretum, Gwangneung Forest, Soheul-eup, Pocheon-si, Gyeonggi-do, collected by Malaise trap: 19.III.-30.III.2018, leg. M.H. Kim, M.C. Kim, S.W. Jo, O. Ki.

Remarks.

Morphologically, the examined specimens exhibited more variability than was known before ( Starý and Schlinger 1967). The pterostigma is more triangular and the petiole more quadrate than in the original description. Chang and Youn (1983) reported A. areolatus from South Korea (one male specimen), but their record of this endemic Japanese species is doubtful. Due to misidentification (Chang and Youn 1983), Aphidius areolatus should be deleted from the previously known Korean parasitoid fauna (personal communication with Prof. Paik). It follows that A. areolatus is recorded from South Korea for the first time in the present study.