Donaciolagria quanyui sp. nov.

(Figs 1C, D, 4C, G)

Type material (1 ♂). HOLOTYPE: CHINA: Xizang: ♂ (CNU, right and left antennomeres XI missing) (Fig. 1C, D): 2023-Ⅴ-18, Mêdog County: Gama Family on Paizhen-Motuo Highway, near Hanmi, Alt. 1981 m, Xing-Long Bai & Quan-Yu Ji leg.

Diagnosis. Pronotum broad, impunctate, widest across premedian portion and base, with a shallow, round impression in each lateral side of posterior half. Donaciolagria quanyui sp. nov. closely resembles D. loongi sp. nov., to the extent that the holotype of D. quanyui sp. nov. was confused among specimens of D. loongi sp. nov. However, D. quanyui sp. nov. exhibits different coloration and also can be readily distinguished by the following characteristics: frons irregularly sculptured between eyes (flattened in D. loongi sp. nov.); pronotum distinctively projected laterally behind apical margin, lateral margins of premedian projecting portions visible; elytra shorter, sharply contracted backward, the ratio of elytral length and width smaller; parameres wider, with lateral margins slightly curved inward in apical half (parameres with lateral margins nearly straight in D. loongi sp. nov.).

Description. Holotype ♂ (Fig. 1C, D). Body length 13.2 mm, width 4.1 mm. Body elongate, shiny, about 3.22× as long as wide; head metallic green, labrum darker, mandibles, antennae black; pronotum black, disc with purple luster, anterior and posterior margins with yellow luster; elytra longitudinally metallic green, with lateral margins, stripes along suture golden, sutural margins black, humeral callosity black with purple luster; legs black except for lighter coxae and femoral bases, femora yellow luster ventrally; in ventral view, head (gula excluded), mesepimeron, mesepisternum, metepisternum, ventrites 1–3 metallic green, other portions darker, with yellow luster. Dorsal surface nearly glabrous, with few long setae scattered on labrum, mandibles, epistome, tempora and apical portion of elytra; anterior and posterior margins of pronotum, tibiae and tarsi, ventral surface with short setae, denser at sides of abdominal ventrites.

Head elongate, widest at eye level.Mouthparts strongly protruding forward;terminal maxillary palpus triangularly elongate with slightly arched, cavate inner surface, broadest at basal 1/5; mandibles robust,bending inward, embracing labrum; labrum cordiform, widest before apical margin, slightly emarginate anteriorly; labro-epistomal membrane exposed, trapezoidal, widest at base; epistome elevated, higher than labrum, transversely rectangular with anterior margin slightly arched backward medially, almost impunctate. Frons depressed between eyes, irregularly sculptured and densely punctate, with anterior portion gently elevated, broadly separated from epistome by arched forward fronto-epistomal impression; frontal canthus swelling, respectively projecting anterolaterally. Vertex impunctate. Eyes slightly bulging, with anterior margin moderately invaded by frontal canthus, interocular distance about 1.45× as long as eye diameter. Antennae filiform, antennomere Ⅰ stout, length ratios of antennomeres Ⅰ–Ⅹ as 40: 19: 55: 49: 58: 62: 60: 50: 53: 39, antennomere XI missing.

Prothorax glossy, about 0.83× as long as wide, widest across premedian portion and base, distinctively wider than head at widest portion, distinctively projected laterally behind apical margin, constricted before base. Pronotum convex, almost impunctate with few minute punctures on lateral sides, with a shallow, round impression in each lateral side of posterior half; anterior angles never processed, posterior angles acute, moderately projecting laterally; anterior margin arched backward with quite thin carina, posterior margin slightly arched forward with broad elevated carina, lateral portions roundly bending toward ventral surface with the margins invisible in dorsal view, except for premedian projecting portions. Prosternal process thin and elevated between coxae, but not high as coxae, expanded backward, roundly triangular posteriorly.

Scutellar shield tongue-shaped, impunctate. Elytra convex, sharply contracted backward, 2.23× as long as wide and 4.84× as long as prothorax; surface with irregular and coarse punctures separated by interspaces 0.5 to 3× puncture diameter, punctures sparser in basal 1/5, portions adjacent to suture longitudinally flattened in apical 3/5; sutural margins impunctate, not elevated; humeral callosity prominent, glossy, sparsely with few punctures posteriorly, rounded in dorsal view, separated from disc by deep impression; elytral margins visible in dorsal view except for the portions beneath humeral callosity; epipleura impunctate, narrow, gradually narrowing toward apex. Metaventrite emarginate apically, elevated, higher than metacoxae, projecting upward before apex and subulate.

Legs slender; femora slightly clavate, almost impunctate, except for few minute scattered punctures; metatibiae slightly flattened in posterior 1/3, with distinct, acute carina along inner margin; metatarsomere Ⅰ longest, about as long as metatarsomeres II–IV combined.

Abdominal ventrites almost impunctate, with very fine and sparse punctures in lateral portions; ventrite 6 visible. Aedeagus curved in basal 1/ 3 in lateral view (Fig. 4G); parameres triangularly elongate, with lateral margins slightly curved inward in apical half (Fig. 4C).

Female unknown.

Distribution. China: Xizang.

Etymology. The species epithet is dedicated to Mr. Quanyu Ji for his generous favor to support beautiful Lagriini specimens, encompassing materials of D. loongi sp. nov. and D. quanyui sp. nov.