Description
Redescription: Habitus as in Fig. 1, body medium sized, 10.1-10.8 mm in total length. Color of head and pronotum metallic blue, green or purple blue; elytra light brown to brown; ventral surface of body light brown to brown. Mouthparts orange; antenna orange to brown; abdomen light brown to brown exceptVIII and posterior part of VII orange.
Head transverse (Figs 2, 4a), with medium-sized setose punctures and distinctive microsculpture (Fig. 4a) in microlines; epicranium shining, with large prominent macrosetae along border of head. Clypeus emarginate; anteclypeus expanded, well developed. Eyes large, prominent, occupying more than 3/4 of lateral margins of head. Ventral surface of head with transverse microsculpture; postoccipital suture and ventral basal ridge present; infraorbital ridge pronounced posteriorly; postmandiblular ridge present, prominent, extending from near mandible to posterior border of head; gular sutures separated throughout length with narrowest point between them near mid-length; nuchal depression prominent forming well defined neck; neck with microsculpture and few micropunctures.
Antenna (Fig. 4b). Antennomeres 1-3 with multiple rows of macrosetae; antennomeres 4-11 with few macrosetae but covered with microtrichia; antennomeres 1-3 longer than wide; antennomere 4 quadrate; antennomeres 5-10 subquadrate to transverse, just slightly asymmetrical, becoming wider towards antennomere 10; antennomere 11 longer than wide.
Mouthparts. Labrum (Fig. 4a) medially incised. Mandibles as in Fig. 3a, b; curved, moderately elongate, with short tooth medially; left and right mandibles nearly symmetrical; with lateral fold extending from condyle to tooth; prostheca setose. Maxilla as in Fig. 3d; galea and lacinia densely setose; maxillary palpi 4-segmented; P1 small, about 1/3 as long as P2; P2 curved, elongate, subequal in length to P3; P2-P3 with large setae apically; P4 elongate, slightly longer than P3. Labium as in Fig. 3c; mentum with one long and one shorter anterolateral setae at each end. Labial palpi 3-segmented; with transverse microsculpture; P1 longer than P2; P2 trapezoidal; both P1 and P2 with several long setae; P3 securiform; P3 apex wide and with 4-5 rows of sensory setae.
Pronotum subquadrate (Fig. 2); hypomeron expanded (Fig. 4c), with microsculpture; superior and inferior marginal lines of hypomeron separate throughout their lengths; superior line fully visible from above, extending around anterolateral margin of pronotum and contacting inferior line at neck fossa; no portion of dorsum of pronotum visible from below; without postcoxal process. Surface of pronotum shining, with scattered large setose punctures and microsculpture made of microlines (similar to but not as dense as on head); punctures on pronotum denser near anterolateral corners; margins of pronotum with several large setae. Mesoscutellum with dense polygon-shaped microsculpture and multiple rows of small punctures. Basisternum (Fig. 4c) with dense polygon-shaped microsculpture and weak carina; anterior marginal depression present; furcasternum with medial carina pointed vertically; furcasternum without microsculpture.
Elytra subequal to pronotum; with confluent or almost confluent punctures and large setae; with micropunctures but no other microsculpture; elytra appearing shining. Hind wings fully developed. Mesoventrite (Fig. 4d) with anterior margin forming “lip”; with dense polygon-shaped microsculpture and few punctures along edges; without median carina. Metaventrite (Fig. 4d) with dense uniform medium-sized punctures; metaventral process small, rounded, triangular.
Legs. Tarsal segmentation 5-5-5; pro- and mesofemur in both sexes with ctenidium ventrally and proximally; meso- and metatibia with multiple rows of spurs; protibia without multiple rows of spurs but with single row of spurs apically. Protarsus (Fig. 5d) enlarged in both sexes, with spatulate setae ventrally; mesotarsus (Fig. 5e) not enlarged except tarsomere 1 in males twice as wide as other mesotarsomeres and with spatulate setae ventrally; metatarsus not enlarged. Empodium with two small setae.
Abdomen with paired protergal glands present; expanding from segment III to segment V (widest) and then becoming narrower towards segment VIII. Abdominal tergites III-V (Fig. 5a) with tergal basal carina and curved (arch-like) carina. Tergites and sternites with distinctive microsculpture (Fig. 5a, b) on anterolateral corners, sometimes expanded medially. Males with secondary sexual structures of sternites VII-IX (Fig. 5c): sternite VII with round porose structure anteriorly and U-shaped emargination posteriorly; sternite VIII with deep U-shaped emargination posteriorly; sternite IX with V-shaped emargination.
Male and Female Genitalia. Aedeagus typical of Xanthopygina (Figs 6, 7); with long median lobe and paramere divided into two lobes. Paramere with peg setae and short apical setae. Spermatheca not sclerotized.