Four new species of Ditrigona Moore (Lepidoptera, Drepanidae) in China and an annotated catalogue Author Guo, Xiao-Jiang Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China & College of Life Science, Hebei University, Baoding, Hebei 071000, China Author Cheng, Rui Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China Author Jiang, Shan Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China Author Xue, Da-Yong Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China Author Han, Hong-Xiang Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China hanhx@ioz.ac.cn text ZooKeys 2022 2022-03-31 1091 57 98 http://dx.doi.org/10.3897/zookeys.1091.78986 journal article http://dx.doi.org/10.3897/zookeys.1091.78986 1313-2970-1091-57 9A83F1CA292E41FCA3217B4719C51E7B BE91F5636B7C53138A1ACDB7B85AAA6A 19. Ditrigona sinespina Jiang & Han sp. nov. Figs 19-20 , 64 , 98 , 131 , 163 Description. Head . Antennae bipectinate, with proximal rami shorter than outer rami, the longest ramus about four times diameter of antennal shaft in male; rami quite short in female, almost equal to diameter of antennal shaft. Frons flattened, width less than diameter of compound eyes; white, upper half with a narrow pale brown transverse band. Labial palpus slender, not extending beyond frons, with outside brown, inner side whitish. Vertex white, pale brown anteriorly. Thorax . Dorsal and ventral sides of thorax white. Tegula white. Hind tibia with two pairs of spurs in both sexes. Forewing length: ♂♀16 mm. Both fore- and hind wings white, transverse lines grey. Forewing with costa pale brown, distal half deeper. Subbasal and antemedial lines slightly bent inwards at middle and costa, the former narrower; postmedial line broad, almost straight; submarginal line double, the inner one slightly wavy and the outer one deeply wavy. Hind wing with antemedial line straight, merging into the elongate grey area along anal margin; postmedial line broader, almost straight, closing to submarginal line near anal angle, forming large pointed teeth on CuA2 and anal fold; submarginal line double, with the inner one nearly straight and only wavy near anal angle, the outer one wavy, the two lines gradually approximating towards anal margin. Anal margin less extended, possessing a quite short tail process, longer in female, with a small black patch. Fringes pale brown. Forewing underside with costa deep brown in basal half. Abdomen . Dorsal and ventral sides of abdomen white. Eighth tergite large, nearly quadrate, with posterior margin shallowly concave; eighth sternite concave at middle, forming two small lateral blunt processes. Male genitalia . Uncus bifurcate over its whole length, both halves short and very narrow. Socii large, rounded. Valva small, ventral margin smoothly curved, distal and posterior margins straight, forming a blunt angle; posterior protrusion rounded. Saccus blunt and rounded. Juxta indistinctly shaped. Aedeagus very stout, terminal part narrower; cornutus a large oval spinose patch. Female genitalia . Papillae analis short; apophyses anteriores moderate, broad basally. Ostium bursae large; ductus bursae indiscernible; corpus bursae round, signum absent. Diagnosis. On the wing pattern, D. sinespina is close to D. tenuiata , but it can be differentiated by the larger distance between the two submarginal lines on the forewing, and the smaller tail process. Compared to D. triangularia and D. uniuncusa , the anal margin of D. sinespina is less extended, and the tail process is distinctly shorter than in those two species. Compared to D. parva sp. nov. and D. concava sp. nov., D. sinespina is larger (with forewing length 16 mm), and the tail process on the hind wing is less developed. In the male genitalia, the slender uncus is similar to that of D. tenuiata and D. concava , but it is longer than in D. tenuiata and shorter than in D. concava . The straight distal margin of the valva is also different from these two species. The shape of the aedeagus, which is broad and blunt posteriorly, also can be distinguished from these two species. The eighth tergite of the male is similar to that of D. concava , but the eighth sternite is different: in D. sinespina it is narrowly and deeply concave, forming two blunt protrusions, while in D. concava it is widely and shallowly concave, forming two small lateral processes. The female genitalia of D. sinespina are also similar to those of D. tenuiata , but can be differentiated by the lack of a signum. Type material. Holotype, ♂, China: Yunnan (IZCAS): Yunlong, Tianchi, 2570 m, 9-12.VIII.2016, leg. Ban Xiaoshuang, slide no. Drep-1054, M33001. Paratypes: Yunnan (IZCAS), 1♂, same data as holotype, M33002, posterior part of abdomen missing; 1♂, same data as holotype, M33029; 1♀, Tengchong, Heinitang, 1824 m, 26-27.VI.2014, leg. Pan Xiaodan, slide no. Drep-1060, M33196. Distribution. China (Yunnan). Etymology. The species is named from the Latin words sine and spina , which refers to the lack of a signum in the female genitalia. Molecular data. The mean intraspecific distance of D. sinespina is 1.55% (min. 0%, max. 2.24%, n = 4). The nearest related species is D. tenuiata , with genetic distance 7.16%.