Agrotera protensa Liu & Qi & Wang 2020, sp. nov.

Agrotera protensa sp. nov.

(Figs. 2, 6)

Type material. CHINA, Hainan Province: Holotype, ♂, Wuzhishan (18.90 °N, 109.67 °E), 738 m, 1.XI.2016, coll. Xia Bai, Shuonan Qian & Wanding Qi, slide No. LP18417. Paratypes (3♂). Wuzhishan: 1♂, Shuiman Town, 690 m, 5.XI.2016, coll. Xia Bai, Shuonan Qian, & Wanding Qi, slide No. LP18195; 1♂, Shuiman Town, 640 m, 16. V.2017, coll. Xiaofei Yang, slide No. LP18483; Yinggeling: 1♂, Nankai Town, 210 m, 14.VIII.2016, coll. Xia Bai, Shuonan Qian & Wanding Qi, slide No. LP16047.

Diagnosis. This species is similar to A. nemoralis (Scopoli, 1763) in the male genitalia by the costal and ventral parts of the valva produced to a narrowly elongate process respectively, but it can be separated by the triangular uncus, the juxta with a tuft of spines distally, the ventral part of the valva lacking apical setae, and the cornuti being a bunch of deciduous spines. In A. nemoralis, the uncus is papillary, the juxta lacks spines distally, the ventral part of the valva has short apical setae, and the phullus has one crescent cornutus (Li et al. 2012: 565, fig. 369).

Description. Adult (Fig. 2) wingspan 16.0–18.0 mm. Head with vertex orange, frons yellowish brown.Antenna yellowish brown, with black ring dorsally, cilia in male approximately as long as diameter of flagellomere. Labial palpus fuscous mixed with yellowish white. Maxillary palpus yellowish brown. Scales at base of proboscis fuscous mixed with yellowish brown. Patagium, tegula and thorax yellowish white with orange dots. Forewing sub-triangular; basal 1/4 yellowish white mixed with orange, terminally edged by antemedial line, distal 3/4 purplish grey mixed with yellow scales; costal margin with a black spot near base, yellow along distal half; antemedial line orange and black, extending from basal 1/4 of costal margin slightly oblique outward to basal 1/3 of dorsum; discoidal stigma crescent-shaped, arched toward base, black, centrally orange; postmedial line black, darker on costa, from distal 1/4 of costal margin sinuate to near middle of of CuA 1, then weakly recurved inward to basal 1/3 of CuA 2, finally sinuate to near distal 1/3 of dorsum; terminal margin black; cilia fuscous mixed with yellowish brown, yellow from below apex to before middle. Hindwing fan-shaped; basal 1/3 yellowish white mixed with a few orange and black scales, yellowish white along dorsum to termen, rest wing purplish grey; with a diffused black spot at posterior angle of cell; with black and orange scales between near base of CuA 2 and middle of 1A; postmedial line black, extending from distal 1/3 of costal margin slightly curved outward to near middle of CuA 1, finally recurved inward to near middle of CuA 2, connecting with a black spot in middle of CuA 2; longitudinal black and orange streak above 3A; terminal margin black; cilia blackish brown mixed with yellowish white, yellowish white mixed with grey at tornus. Legs yellowish white, mixed with blackish brown on fore coxa ventrally, fore tibia and inner side of fore femur, black on 4 th and 5 th tarsomeres and at apices of 1 st and 3 rd tarsomeres.

Male genitalia (Fig. 6). Uncus elongate triangular. Transtilla arising from basal 1/4 of costa, almost touching each other and downcurved medially. Valva wide and subparallel basally, divided to costal and ventral parts from basal 2/5: costal part wide at base, slightly narrowed to middle, then sharply produced to a narrowly elongate process; ventral part narrow and shorter than costal part, produced to an elongate sub-triangular process with acute apex; costa band-like, terminating at basal 3/5 of costal margin; clasper long, slender, arising from below base of costa, arched dorsad medially, pointed apically. Saccus triangular, obtusely rounded anteriorly. Juxta sub-triangular from base to basal 1/8, gradually narrowed from basal 1/8 to basal 1/3; distal 2/3 bifid, with a tuft of short spines distally. Phallus slightly shorter than valva; cornuti being a bunch of deciduous spines.

Female unknown.

Distribution. China (Hainan).

Etymology. The specific name is derived from the Latin protensus, referring to the elongate sub-triangular process of the valva.