Korinchocoris venulus Zhang, Zhao

Zhang, Wenjie, Zhao, Ping, Ishikawa, Tadashi & Cai, Wanzhi, 2010, Notes on the genus Korinchocoris Miller (Hemiptera: Reduviidae: Reduviinae), with the description of a new species from Laos, Zootaxa 2497, pp. 62-66 : 63-66

Korinchocoris venulus Zhang, Zhao , Ishikawa & Cai, sp. nov.

( Figs. 1–8 )

Description. Female. Coloration. Body scarlet. Membranous areas between veins of corium (except basal part) and clavus, third and fourth antennal segments brown to dark brown; membrane of hemelytra black; tarsi light reddish yellow; eyes reddish brown, ocelli reddish.

Structure. Body clothed with dense yellowish setae; first antennal segment with annularly situated dense oblique setae, second segment with oblique short setae, third and fourth segments with short setae and a few long setae; postocular area with dense, bent setae. Anteocular area narrower and slightly shorter than postocular (excluding neck); anteclypeus between bases of antennae somewhat elevated ( Fig. 2 ); postocular area strongly globose, then constricted posteriorly ( Figs. 1 , 2 ); eyes large and protruding laterally, subreniform; basal antennal segment shorter than head in length, feebly curved, thicker in apical half; second antennal segment cylindrical, thick and straight; third and fourth antennal segments slender; rostrum curved, basal segment extending to middle of eyes, subequal to second and third segments combined in length. Pronotum constricted before middle; anterior pronotal lobe bulged, arcuately laterally sulcate, medially longitudinally sulcate; median sulcus continuous with that on posterior lobe; disk of posterior lobe medially broadly deeply sulcate, and depression not extending to posterior margin; lateral pronotal angle rounded; posterior margin nearly straight and slightly convex; scutellum broadly triangular with deep depression basally, apical part produced horizontally and rounded ( Fig. 1 ); apical 2/3 of inner surface of fore femur and inner surface of fore tibia with a row of spines ( Fig. 3 ); fore femur moderately incrassated and feebly bent inwards, apical portion of fore tibia feebly curved; third tarsal segment subequal to or slightly longer than first and second segments combined. Hemelytron just extending beyond tip of abdomen; discal cell open, without crossvein cu-pcu 2, and continuous with inner cell of membrane. Apical part of abdomen as in Figs. 6–8 .

Measurements [Ƥ (n=1), in mm]. Body length 8.28; maximal width of abdomen 3.48. Length head 1.22; length anteocular part 0.41; length postocular part 0.44; length synthlipsis 0.59; interocellar space 0.19; length antennal segments I–IV= 0.88, 1.56, 0.72, 0.84; length rostral segments I–III=0.50, 0.34, 0.19; length anterior lobe of pronotum 0.56; length posterior lobe of pronotum 1.03; maximal width of thorax 2.72; length scutellum 0.81; length hemelytron 5.94.

Type material. Holotype, Ƥ, Laos, Puh (Mt.)-Pan, 1,000 m, Xam Nua, Houa Pan, 16–21-VI-2003, S. Nagai leg.

Male. Unknown.

Distribution. Laos.

Etymology. The specific name refers to the special vein structure of the fore wing.

Remarks. The new species is similar to K. chinai Miller, 1941 and K. malayus Miller, 1941, but is easily distinguished from the latter two species by the special structure of the discal cell of the corium and the body color. In K. venulus the discal cell of the corium is continuous with the inner cell of the membrane as a result of losing of the cross vein, the body color is scarlet except for the membranous areas between veins of the corium and the membrane of the fore wing, and the membrane without a pale V-shaped area near the external basal angle (vs. in K. chinai and K. malayus the discal cell is normal and the body color is different to new species.

The new species also resembles K. insolitus Miller, 1941, but the pronotum of the latter is constricted near middle and the external angles of the second and third connexival segments are roundly produced (vs. in K. venulus , the pronotum is constricted before the middle, and only the external angle of the second cnnexival segment is somewhat produced). The six species, including the new one herein described, in the genus Korinchocoris, can be distinguished from the above key.

Figures

FIGURE 1. Korinchocoris venulus Zhang, Zhao, Ishikawa & Cai sp. nov., Ƥ, habitus. Scale bar of 1 = 1.19 mm.

FIGURES 2 – 8. Korinchocoris venulus Zhang, Zhao, Ishikawa & Cai sp. nov., Ƥ; 9. Korinchocoris sp., Ƥ. 2, head and pronotum, antennae removed; 3, right fore leg; 4, right mid leg; 5, right hind leg; 3 – 6, coax, trochanter and basal part of femur removed; 6 – 8, apical part of abdomen; 9, fore wing. 2, 3 – 5, 7, lateral view; 8, ventral view; 6, caudal view. Scale bar of 2 = 1.11 mm; of 3 – 5 = 0.64 mm; of 6 – 8 = 0.74 mm; of 9 = 0.89 mm.