Metrocoris vietnamensis Tran & Zettel, 2005

(Figs. 9, 52–55)

Metrocoris vietnamensis Tran & Zettel, 2005: 42–45, Figs. 1–9, 24, 26, 27 (type locality: Ba Na - Nui Chua, Da Nang, Vietnam).

Material examined. Holotype and paratypes: see Tran & Zettel (2005).

Others: VIETNAM: Da Nang Prov.: 1 male, 1 female (apt), Ba Na - Nui Chua, Suoi Nai - Thac Cau Vong, coll. Tran A.D. & Tan H.H., 01 March 2005, THH05-23 (ZRC); 3 males, 5 females (apt), Ba Na - Nui Chua, Suoi Vong Nguyet, coll. Tran A.D. & Tan H.H., 01 March 2005, THH05-24 (ZRC) .

Diagnosis. Male: fore femur variably incrassate (ratio length/width: 3.03–4.36), ventral surface of fore femur in distal one-fourth with black indentation which proximally marked by distinct tooth, and with single stout sub-apical tooth; inner surface of fore tibia subbasally with tooth-like elevation (indistinct in males with small fore leg) (Figs. 52, 53). Male genitalia: pygophore not raised posteriorly, caudal margin broadly rounded, caudal face with paired, shallow impressions, dorso-lateral process curved and apically blunt (see Tran & Zettel, 2005: Figs. 4, 5); proctiger elongate (see Tran & Zettel, 2005: Fig. 5); paramere prominent, falciform, strongly curved and apically strongly narrowed (Fig. 54); endosoma: dorsal sclerite long and recurved proximally, apical accessory sclerite distinct, lateral sclerite very large, slightly curved, ventral sclerite short, thin accessory lateral sclerite present (see Tran & Zettel, 2005: Figs. 7, 8). Sternum 7 of female (Fig. 55): large, slightly longer than preceding abdominal sterna together, posterior one-third constricted, bifid forming two widely separated lobes, slightly slanting but not curved dorsad; notch between lobes as wide as each lobe; apices of lobes pointed, reaching apex of abdomen in ventral view.

Size: apterous males: length 6.0–6.8 (holotype 6.7), width 2.67–3.06 (holotype 2.96), macropterous males: length 6.2, width 2.73; apterous females: length 5.1–5.5 (allotype 5.4), width 2.81–3.10 (allotype 3.01).

Remarks. Metrocoris vietnamensis belongs to the Metrocoris bilobatus species group (sensu Chen & Nieser, 1993), and is the second species of this group found in Vietnam, the first being M. bilobatoides (see Chen & Nieser, 1993). A detailed comparison of Metrocoris vietnamensis with its congeners in the M. bilobatus group has already been provided by Tran & Zettel (2005: 44–45). For further comparisons with other members of M. bilobatus group which occur in Vietnam, see subsequent Remarks under M. johnpolhemi, new species .

Distribution. Vietnam: Da Nang (Fig. 138).