Agrotera robustispina sp. nov.

(Figs. 4, 8, 10)

Type material. CHINA, Hainan Province: Hainan Province: Holotype, ♂, Bangwangling (19.11°N, 109.09°E), Changjiang Country, 146 m, 13.VIII.2017, coll. Xia Bai, Ping Liu & Shuai Yu, slide No. LP18297. Paratypes (7♂, 1♀). 6♂, 1♀, 12–16.VIII.2017, other same data as holotype, coll. Xia Bai, Ping Liu & Shuai Yu, slide Nos. LP17532 ♂, LP18303 ♂, LP18349 ♂, LP18350 ♂, LP18399 ♂, LP18404 ♂, LP18298 ♀; 1♂, Datian Reserve, Dong- fang City, 56 m, 4. VI.2018, coll. Ping Liu, Xia Bai & Shuai Yu, slide No. LP17905.

Diagnosis. This species is characterized by the T-shaped clasper of the male genitalia. It is similar to A. longitabulata Chen, Horak, Du & Zhang, 2017 in the features of male genitalia, but it can be separated by the uncus being paired sub-triangular lobes and the sacculus produced to a large free distal spine. In A. longitabulata, the uncus is sub-triangular, and the sacculus does not have a large free distal spine (Chen et al. 2017: Fig. 8).

Description. Adult (Fig. 4) wingspan 18.0–24.0 mm. Head with vertex orange mixed with yellowish white, frons fuscous. Antenna yellow, with black ring dorsally, cilia in male approximately as long as diameter of flagellomere. Labial palpus fuscous mixed with yellowish white scales. Maxillary palpus yellowish brown, black distally. Scales at base of proboscis fuscous mixed with yellowish white. Patagium, tegula, and thorax yellowish white mixed with orange spots. Forewing sub-triangular; basal 1/3 yellowish white mixed with orange, terminally edged by antemedial line, distal 2/3 purplish grey mixed with yellow scales; costal margin yellow, with a black spot near base; antemedial line orange and black, extending from basal 1/3 of costal margin sinuate to basal 2/5 of dorsum; discoidal stigma ovate, orange, intermixed with black scales; postmedial line blackish brown, from distal 1/4 of costal margin sinuate to middle of CuA 1, then recurved inward to basal 1/3 of CuA 2, finally sinuate to near distal 1/3 of dorsum; terminal margin black; cilia greyish brown except yellowish white below apex and above ventral corner of termen. 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 small black spot at posterior of cell; with a black spot between near base of CuA 2 and middle of 1A; postmedial line blackish brown, from distal 1/3 of costal margin sinuate to midlle of CuA 1, finally recurved weakly inward to near middle of CuA 2, connecting with a black spot in middle of CuA 2; longitudinal orange and black streak above 3A; terminal margin black; cilia blackish brown, yellowish white at tornus. Legs yellowish white, mixed with black on fore coxa ventrally as well as on fore femur and fore tibia, black on 4 th and 5 th tarsomeres and at apices of 1 st and 3 rd tarsomeres.

Male genitalia (Fig. 8). Uncus paired sub-triangular lobes, with setae laterally and apically. Transtilla wide, band-like, extending from middle of costa, almost touching medially. Valva gradually widened from base to before middle, thereafter gradually narrowed to pointed apex, with setae on distal 1/3 of ventral margin; costa band-like, with setae distally, terminating beyond middle of costal margin; clasper T-shaped, arsing from below basal 1/3 of costa; sacculus more than 2/3 length of valva, subparallel from base to basal 3/5, projecting triangularly on dorsal margin before basal 3/5; distal 2/5 produced to a large free spine acute at apex. Saccus sub-rectangular from base to basal 2/3, gradually narrowed from basal 2/3 to apex, obtusely rounded on anterior margin. Juxta with basal 1/3 shield-shaped, narrow and parallel from basal 1/3 to distal 1/6, distal 1/6 bifid. Phallus about same length as valva.

Female genitalia (Fig. 10). Apophyses anteriores about same length as apophyses posteriores, expanded rhomboidally from basal 1/3 to basal 2/3. Lamella postvaginalis inverted U-shaped, lateral arms narrowed and curved inward anteriorly. Antrum funnel-shaped, large and wide. Ductus bursae about 1.5 times length of corpus bursae. Corpus bursae oval; signum absent.

Distribution. China (Hainan).

Etymology. The specific name is derived from the Latin robustispinus, referring to the large free distal spine of the sacculus.