Ypsolopha longifloccosa Jin, Wang & Li, 2013, sp. nov.

Ypsolopha longifloccosa sp. nov.

(Figs 31, 81, 131, 177)

Type material. Holotype: ♂, China, Suyukou, Mt. Helan (38°30′ N, 106°06′ E), Ningxia Hui Autonomous Region, 2000 m, 2.vii.2006, coll. Feng Yang & Qi He, genitalia slide No. JQ07246. Paratypes: 1 ♀, same data as for holotype; 1 ♂, Xiaowutai (39°57′ N, 115°02′ E), Yu County, Hebei Province, 1200 m, 22.viii.2005, coll. Yunli Xiao; 3 ♂♂, Yebadan Reserve (46°46′ N, 82°59′ E), Xinjiang Uygur Autonomous Region, 8–21.vii.1997.

Diagnosis. This species is characterized by the second segment of the labial palpus with an extremely long tuft that is 1.5 times length of its own length. It is similar to Y. brevivalva sp. nov. both externally and internally, but differs in the forewing having M3 and CuA1 connate (Fig. 81), the male phallus slightly longer than the valva (Fig. 131), and the female ductus bursae 2.5 times length of the corpus bursae (Fig. 177). In Y. brevivalva sp. nov., M3 and CuA1 of the forewing are separated (Fig. 80), the phallus in the male genitalia is 1.5 times length of the valva (Fig. 130), and the ductus bursae is just slightly longer than the corpus bursae (Fig. 176).

Description. Adult (Figs 31 a-b): Wing expanse 23.0−25.0 mm. Head grayish white, mixed with brown. Antenna brown, scape white mixed with light brown on ventral surface, flagellomere ringed with white. Labial palpus grayish brown mixed with brown, basal segment white on ventral surface, second segment white at base and on dorsal surface; tuft of second segment triangular, about 1.5 times length of labial palpus; third segment half length of second. Thorax and tegula grayish white, scattered with brown. Forewing covered with white-tipped grayish brown to dark brown scales, scattered with yellowish brown and white scales; costa with six black patches, alternated with six small white to grayish white patches; cell with a large black patch at middle that is joined with second costal black spot anteriorly, with smaller black spot at basal 1/4 and end respectively; termen black mixed with white, or with 5–7 black dots; ill-defined black spot at tornus; cilia grayish brown, dark brown mixed with white at apex. Hindwing yellowish brown to grayish brown; cilia yellowish brown. Wing venation as illustrated (Fig. 81). Fore- and midlegs white, scattered with brown scales, ringed with brown on each tarsomere; hindleg white except dark brown on inner side of femur, tibia mixed with brown on outer side of distal half.

Male genitalia (Fig. 131): Uncus degenerate. Socius broad at base, narrowed to pointed apex. Ventral plate of gnathos ovate. Valva twice as long ad wide, slightly narrowed at base. Saccus nearly as long as socius, narrow at base, broadened to dilated apex. Anellus about a quarter length of phallus, sparsely spinous in distal half. Phallus extremely slender, 1.2 times length of valva; coecum about 1/5 length of phallus; cornuti slender, about half length of phallus.

Female genitalia (Fig. 177): Intersegmental membrane between papilla analis and 8th abdominal segment 3/5 length of abdomen. Apophyses posteriores about 2.2 times length of apophyses anteriores. Lamella postvaginalis V-shaped. Antrum sack-shaped. Ductus bursae about 2.5 times length of corpus bursae, sparsely granulous anterior to antrum. Corpus bursae pear-shaped; signum about half length of corpus bursae, ridged at anterior 1/3 and posterior 1/6 respectively.

Distribution. China (Hebei, Ningxia).

Etymology. The specific epithet is derived from the Latin prefix longi-, meaning long, and the Latin floccosus, meaning tufted, referring to the long tuft on the second segment of the labial palpus.