Exochus propodealis Lee & Choi sp. nov.

(Figures 2d, 3j, 6j)

Specimens examined

Holotype: female, type depository: YNU; (South Korea) GW, Hongcheon-gun, Bukbong, Environment Research Park, 15 – 30 May 2012, leg. S.J. Jang.

Description

Female. Forewing 4.8 mm, body 6.6 mm long.

Colour. Black. Flagellum from below yellow orange; couple small spots between top of eyes and lateral ocelli, palpi, narrow transverse stripe in upper part of face and front half of tegula yellow; legs red orange, coxae, trochanters and metasomal tergites apically dark brown.

Head. Distinctly narrowed behind eyes. Frons V-shaped concave above base of antennal sockets. Antenna with 29 flagellomeres. First flagellomere 2.2 times as long as wide, the segments on apical two-thirds of flagellum transverse. Occipital carina present only laterally. Hypostomal carina moderately high. Face moderately strongly convex. Front tentorial pits not indicated. Clypeus with apical ridge weakly concave in the middle. Combined face and clypeus 1.1 times as wide as high in frontal view, densely and coarsely punctate, the distance between points shorter than their diameter. Malar space without furrow, 0.6 times as long as basal width of mandible. Lower tooth of mandible much shorter than upper tooth, but well visible.

Mesosoma. 1.7 times as long as high in lateral view. Epomia weak, notauli indicated only as small pits. Mesopleuron moderately swollen below subtegular ridge. Prepectal carina reaching subtegular ridge. Hind part of mesosternum projected as a pair teeth along mesosternal suture. Metapleuron smooth and lustrous with some setae on hind corner. Front half of justacoxal carina widened and projected in front as a tooth. Radial vein originated a little behind middle of pterostigma. Vein Rs+M strongly curved. Vein Cu-a weakly postfurcal at about 0.3 of its length. Parallel vein connected with postnervulus in its lower third. Hindwing with seven distal hamuli. Vein cu-a of hindwing almost vertical, vein Cu1 of hindwing distinct. Legs moderately stout, hind femur 2.3 times as long as wide. Ratio between length of hind tarsal segments as 27: 12: 8: 7: 14. Front tibial spur of mid legs 0.5 times as short as hind spur. Tarsal claws simple. Propodeum without costula (Figure 6j). Apical transverse carina in the middle and lateromedian longitudinal carinae limiting area superomedia laterally obsolete. Apical and lateral part of area dentipara haired. Propodeal spiracle 2.0 times as long as wide, closer to pleural than to lateral longitudinal carina.

Metasoma. Median longitudinal carinae on tergite 1 extending on its basal 0.4. Glymma deep. Second tergite concave in the base, 0.8 times as long as wide apically. Epipleuron of tergite 3 semicircular, the basal three-quarters of edge being regularly convex. Ovipositor shorter than apical depth of metasoma.

Male. Unknown.

Etymology

From propodeum with obsolete lateromedian longitudinal carinae and middle part of apical transverse carina.

Distribution

South Korea.

Remarks

The species is close to Exochus bicoloripes Kusigemati, 1971, but differs by smaller size of the body, lower number of flagellomeres, longer first flagellomere, obsolescent lateromedian longitudinal carinae and middle part of apical transverse carina, strongly curved vein Rs+M and coloration of the body.