Itara (Itara) vietnamensis Gorochov, 1985

Itara vietnamensis Gorochov, 1985: 17

Itara (Itara) vietnamensis Gorochov, 1997: 59, 60; Ma & Zhang, 2015: 537

Holotype. Type locality: Vietnam: Vinh Phu Province, Tam Dao. Deposited at Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia (not examined).

Material examined. China: 4 males, Yunnan, Mengla, Longmen, 17-v-2009, Libin Ma coll.; 2 males, Hongkong, Feihe Mountain, 18-v-2018, Libin Ma coll.; 6 males, Guangxi, Longzhou, Nonggang National Natural Reserve, 25-iv-2019, Libin Ma & Tao Zhang coll.; 3 females, Guangxi, Longzhou, Nonggang National Natural Reserve, 25-iv-2019, Libin Ma & Tao Zhang coll ..

Description. Male. Body large for the genus. Head somewhat large, occiput broad and pubescent, vertex bearing fine and short setae. Median ocellus large and shaped as lunule. Antennal scape shaped as round shield. Genae slightly convex. Labrum apical margin broadly concave. Terminal maxillary palpus bevelled apically, almost equal to length of 3rd palpus; terminal labial palpus rod-like, almost equal to total length of remaining palpi. Pronotum trapezoidal, disc flattened and broad, anterior margin weakly concave, posterior margin slightly convex (Fig. 3A). Harp area bearing 5 harp veins. False veins distributed in harp field and mirror. Forewing dorsum broad (Fig. 3A). Apical field of elytra armed with 7 branches (Fig. 3A). Exposed part of hind wings slightly shorter than hind tarsus (Fig. 3A). External tympanum large and shaped as elongate-ovoid. Hind tarsus armed with dorsal spines, numbered 9:9 for inner and outer.

Metanotal gland armed with transverse and sinuate convexity anteriorly, rather large and shallow concavity medially, almost flattened part (ornamented with short hairs) posteriorly, and two protuberance in both sides (Fig. 3C). Anal plate tongue-shaped, rather small, half of basal sides ridged (Fig. 3D).

Male genitalia (Figs. 3 E–3G). In lateral view, epiphallic apex slightly expanded, angled at distal margin and armed with small denticles (Fig. 3F); in dorsal view, epiphallic apex possessing obtuse angle at inner margin and outside widely concave (Fig. 3E).

Female. Similar to male (Fig. 3B). Ovipositor very longer than hind tibia; its apex of rather acute and episternites blunt (Figs. 13B, 14B).

Coloration. Body colored yellowish brown. Head colored brown. Top margin of eyes, lateral margin of frons and face colored light. Hind wings and apical field of forewing brown (Fig. 3A).

Measurements. Male (n=12). BL 17.68±1.87, HW 3.66±0.29, PL 2.63±0.40, PW 4.44±0.32, FWL 16.56±1.74, HWL 4.60±0.61, DVL 4.42±0.60, ML 3.87±0.49, HFL 10.06±0.83, HTL 7.96±0.62, HML 4.27±0.40. Female (n=3). BL 17.62±1.03, HW 3.15±0.33, PL 2.20±0.26, PW 3.82±0.29, FWL 14.07±0.96, HFL 8.98±0.64, HTL 6.56±0.41, HML 4.17±0.30, OL 11.72±1.09.

Remarks. This species is very similar to I. (I.) aperta and Itara (Itara) abdita Gorochov, 1996 in epiphallic apex which inward curved, but its epiphallic apex is quadrate.