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 21. Ditrigona concava Guo & Han sp. nov. Figs 23 , 66 , 100 , 133 Description. Characters of head and thorax in male same as in D. sinespina . Forewing length 16 mm in male. Fore- and hind wings white, transverse lines grey. Forewing with costa pale brown. Subbasal line slightly bent inwards at middle and costa; antemedial line straight and only bent inwards near costa; postmedial line broad, almost straight; submarginal line double, the inner one slightly wavy and the outer one deeply wavy. Hind wing with antemedial line slightly convex at middle, bent outwards and merging into the elongate grey area along the anal margin; postmedial line broader, almost straight, slanting outwards and closing to meet 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, with a quite short tail process, longer in the female, with a small black patch. Fringes pale brown. Forewing underside with costa deep brown in basal half. Figures 64-74. Male genitalia of Ditrigona 64 D. sinespina sp. nov., holotype 65 D. parva sp. nov., holotype 66 D. concava sp. nov., paratype 67 D. titana , ZFMK 68 D. pomenaria 69 D. typhodes 70 D. lineata lineata 71 D. artema 72 D. candida , paratype, ZFMK 73 D. chionea 74 D. fusca sp. nov., holotype. Scale bars: 1 mm. Male genitalia . Uncus bifurcate over its whole length, both arms slender. Socii large, terminally semicircular, rough apically. Valva small, distal and posterior margin shallowly concave, posterior protrusion rounded. Saccus blunt and rounded. Juxta large, slightly sclerotized, indistinctly shaped. Aedeagus stout, terminal part narrow; cornutus an oblong spinose patch. Eighth tergite quadrate, posterior margin almost straight; eighth sternite shallowly concave, with two small lateral protrusions. Female genitalia . Unknown. Diagnosis. The most distinctive character of D. concava lies in the male eighth sternite, which is different from all other congeners by the wide and shallow concavity, bearing two small lateral processes. The male genitalia are similar to those of D. tenuiata and D. sinespina , and can be differentiated by the following differences: the uncus is longer than in those two species; the distal and posterior margins of the valva are shallowly concave in D. concava , but the two margins are straight in D. sinespina . Type material. Holotype, ♂, China: Yunnan (IZCAS): Ailao Shan, 2600 m, 11.VIII.2011, leg. Kitching Ashton, slide no. Drep-1095, ARB00027811, ex. XTBG. Paratype: 1♂, Yunnan (IZCAS): Weixi, Tacheng, 2800 m, 13-14.VII.2014, leg. Li Xinxin, slide no. Drep-1091, M32975. Distribution. China (Yunnan). Etymology. The species is named after the Latin word concavus , which refers to the shallowly concave 8th male sternite. Molecular data. An intraspecific distance of D. sinespina of 2.07% ( n = 2) was recorded. The nearest related species is D. parva , with a genetic distance of 9.56%.