Biston marginata Shiraki, 1913

Jiang, Nan, Xue, Dayong & Han, Hongxiang, 2011, A review of Biston Leach, 1815 (Lepidoptera, Geometridae, Ennominae) from China, with description of one new species, ZooKeys 139, pp. 45-96 : 52-53

Biston marginata Shiraki, 1913 Figs 7-107198117

Biston marginata Shiraki, 1913, Spec. Rep. Formosa agric. Exp. Stn, [Special reports No. 8] Publication no. 68: 433, pl. 44. Syntypes, China: Taiwan.

Biston fragilis Inoue, 1958, Tinea, 4 (2): 254, pl. 34, fig. 30. Holotype ♂, Japan: Oita Prefecture, Saeki. (BMNH) (Synonymized by Inoue (1965))

Diagnosis.

The diagnostic characters of external morphology of the species can be seen in the previous species. The male genitalia of the species are close to those of Biston suppressaria . But it can be distinguished from the latter by the following characters: the vesica is less strongly sclerotized posteriorly; the cornutus is small and spine-like but absent in Biston suppressaria . The female genitalia are similar to those of Biston betularia , but they differ in the following characters: the ductus bursae is shorter and the antrum is absent; the corpus bursae is almost even in width, while in Biston betularia it is enlarged, wrinkled and weakly sclerotized posteriorly, narrow medially and swollen anteriorly; the signum is oval with several marginal spines, but a transverse bar in Biston betularia .

Material examineds.

CHINA, Fukien [Fujian] (ZFMK): Kuatun, 2300 m, 3.IV.1938, coll. J. Klapperich, 1♂. Formosa [Taiwan] (ZFMK): Nantou, SW Tsuifeng, 2100m, 16.III.1996, coll. Csoevari and Steger, 2♂; Puli, IV.1958, coll. ZSM, 2♂. Hunan (IZCAS): Dongan, 24.II.1955, 4♀; Changning, 1981, 1♀. Guangdong (IZCAS): Guangzhou, VIII.1984, 1♂; Yingde, Chayesuo, 1♂. Guangxi (IZCAS): Bobai, Yunfei, Fenchang, 2-3.I.1986, coll. Wang Jijian, 1♂2♀. Chongqing (IZCAS): Beipei, Jinyunshan, 10-12.II.1987, 1♂1♀. Yunnan (IZCAS): Suining, VII.1980, 1♂. VIETNAM (ZFMK): Tam Dao, 950 m and Fan-si-pan, 1520 m, III.1995, large series of males and a few females.

Distribution.

China (Zhejiang, Jiangxi, Hunan, Fujian, Taiwan, Guangdong, Guangxi, Chongqing, Yunnan), Japan, Vietnam.