Aphidius longistigmus Kim & Tomanovic sp. nov.

Fig. 3A-G

Diagnosis.

On the basis of the number of maxillary (three) and labial (two) palpomeres, number of antennal segments, and possession of an elongate pterostigma, the new species is morphologically related to A. matricariae . However, it differs clearly from A. matricariae in having a very elongate fore wing pterostigma (fore wing pterostigma length/width ratio of 4.96-5.46 in Aphidius longistigmus sp. nov., vs. 3.50-4.00 in A. matricariae) and shorter flagellomere 1 (F1 length/width ratio of 2.11-2.52 in Aphidius longistigmus sp. nov., vs. 2.50-3.00 in A. matricariae).

Description.

Female. Length of body about 1.85 mm (Fig. 3A). Length of fore wing 1.45 mm (Fig. 3B).

Head. Tentorial index 0.39-0.50 (Fig. 3D). Malar space 0.26-0.30 times longitudinal eye diameter. Antenna 13-15-segmented (Fig. 3C). F1 slightly shorter than F2. F1 and F2 2.11-2.52 and 1.93-2.28 times as long as their width at the middle, respectively. F1 with 2-3 and F2 with 3-4 longitudinal placodes. Maxillary palp with three palpomeres, labial palp with two palpomeres. Ratio of eye to temple in dorsal view 0.98-1.13. Face width/height ratio 1.43-1.51 (Fig. 3D).

Mesosoma. Propodeum with clearly defined central areola, areola length/ width ratio 1.00 (Fig. 3E). Pterostigma 4.96-5.46 times as long as wide. Ratio of pterostigma length to R1 vein (=metacarpus) length 1.00-1.34 (Fig. 3B).

Metasoma. Petiole 3.09-3.29 times as long as wide at spiracles (Fig. 3F, G), with about 10 curved costulae in anterolateral area (Fig. 3G). Petiole with prominent dorsal carina (Fig. 3F).

Colour. Antenna dark-brown; scape, pedicel, and flagellomere 1 yellowish-brown, partly dark-brown. Head black. Face with clypeus dark-brown, mouth parts yellowish-brown. Dorsal side of mesoscutum and metasoma dark-brown, except for propodeum with petiole. Legs yellowish-brown with dark apices.

Etymology.

The name of the new species refers to the very long fore wing pterostigma.

Specimens examined.

Holotype: Korea, 1 ♀; DMZ Botanical Garden, Mandae-ri, Haean-myeon, Yanggu-gun, Gangwon-do, collected by Malaise trap: 05.IX. - 19.IX.2017, leg. H.T. Shin, S.J. Kim. Holotype deposited in the Korean National Arboretum, Gyeonggi-do, Republic of Korea .

Paratypes: Korea, 3 ♀; 1 ♀, DMZ Botanical Garden, Mandae-ri, Haean-myeon, Yanggu-gun, Gangwon-do, collected by Malaise trap: 04.VII.-18.VII.2017, leg. H.T. Shin, S.J. Kim. 2 ♀, same locality, collected by Malaise trap: 19.IX.-10.X.2017, leg. H.T. Shin, S.J. Kim. Paratype specimens deposited as dry and immersion-mounted in the Korean National Arboretum, Gyeonggi-do, Republic of Korea .