Eupithecia caementariata sp. n.

(Figs 6, 20, 24)

Type material: Holotype, ♂, China, N. Sichuan, Road Jiuzhaigou / Songpan, 2900 m, 33°08.770ʹ N, 103°43.624ʹ E, 21.v.2017, A. Saldaitis leg. Gen. prep. J. Procházka 20131, Photo J. Šumpich 22107 (NMPC).

Diagnosis. This species belongs to the satyrata species group. It is similar to Eupithecia eremiata sp. n., but the fore wing is paler with more visible transverse lines; the medial line is sharply angled onto the costa behind the discal dot; the large whitish tornal spot is present; the hind wing is paler, pale brownish.

Description. Adult. (Figs 6, 20). Male. Wingspan 21.5 mm; fore wing 13.0 mm. Head and notum covered with whitish scales. Fore wing rather elongate and narrow, costal margin bowed, apex very narrowly rounded; ground colour brown; basal transverse line evenly curved; antemedial line right angled onto costa in areole; medial line sharply angled onto costa behind discal dot; postmedial line rather wavy and right angled onto costa behind areole; all transverse lines forming blackish costal spots; near apex also a large blackish costal spot; light subterminal line dentate, forming a prominent whitish tornal spot; discal dot relatively large, ovoid, black. Hind wing ovoid, pale brownish; terminal area slightly darker, dark traces of basal and medial lines placed along anal margin; discal dot small, rather rounded, brownish. Terminal lines on all wings clear, relatively broad, interrupted on the veins, blackish brown. Fringe chequered with brown and pale brownish.

Male genitalia (Fig. 24). Uncus biapical. Valve shaped like an orange segment, unmodified, with slightly concave dorsal margin and evenly curved ventral margin; apex narrowly rounded; sacculus weakly sclerotized. Vinculum short and broad, semicircular. Papillae on the anterior arms of the labides slightly broadened to apices and covered with short setae. Aedeagus narrowed from ductus ejaculatorius base to anterior end. Vesica armed with three elongate apical dentate cornuti, and one folded, irregular cornutus closer to ductus ejaculatorius base. Sternite A8 peg-like, elongate, with two small, short, rounded apical lobes, broadened and bilobed basally; basal hollow relatively broad and deep.

Female. Unknown.

Bionomy. Host plant unknown. The holotype was collected by light in May at an elevation of 2900 m (Fig. 39).

Distribution. China. Known from Sichuan province.

Etymology. From latin word “cementarius”—“a mason” in english.