A new species of the genus Pieris Schrank, 1801 (Lepidoptera: Pieridae: Pierinae) with taxonomic notes on the Pieris napi group from India Author Das, Gaurab Nandi 0000-0002-4722-3100 gaurab 68 nandidas @ gmail. com; https: // orcid. org / 0000 - 0002 - 4722 - 3100 gaurab68nandidas@gmail.com Author Eitschberger, Ulf Entomologisches Museum Humboldtstrasse 13 A, D- 95168 Marktleuthen, Germany. Author Singh, Navneet 0000-0002-6657-7983 nsgill 007 @ gmail. com; https: // orcid. org / 0000 - 0002 - 6657 - 7983 nsgill007@gmail.com Author Chandra, Kailash 0000-0001-9076-5442 kailash 611 @ rediffmail. com; https: // orcid. org / 0000 - 0001 - 9076 - 5442 kailash611@rediffmail.com text Zootaxa 2021 2021-07-22 5004 4 501 520 journal article 10.11646/zootaxa.5004.4.1 1175-5326 5140718 1F52E880-A352-4949-A937-802A462D9689 Pieris erutae erutae Poujade, 1888 ( Figs 11–14 , 20 , 25, 26 , 36–38 , 45–47 , 54–56 , 62, 63 , 70–72 , 78–80 , 86 ) Pieris erutae Poujade, 1888 : xix ( Type locality: “Mou-Pin”). Sbordoni et al. , 2015: 546 . Pieris melete var. erutae Poujade ; Leech, 1893: 450. Pieris melete var. mandarina Leech, 1893: 451 ( Type locality: “North China ”). Pieris melete alpestris Verity, 1908: 166 ( Type locality: Ta-tsien-lou). Pieris melete australis Verity, 1911: 331 ( Type locality: Haut Younnan ). Pieris erutae erutae Poujade ; Eitscherger, 1983: 370. Winhard, 2000: 29 . Tadokoro et al ., 2017: 90 . Pieris melete ajaka Moore ; Sondhi & Kunte, 2016: 9107 . Material examined. India , Arunachal Pradesh : 1♂ , Changlang , Namdapha , Anamika falls , 413 m , 13.iii.2017 , leg . Saini & Party ( gen. aest. ) (28717/ H9 , NZCZSI) ; 1♂ , Dibang Valley , Pathar Nalah , 2029 m , 19.iv.2017 , leg . Gayen & Das ( gen. aest. ) (28718/ H9 , NZCZSI) ; 1♂ , Dibang Valley , near Anini , 1162 m , 12.v.2017 , leg . Gayen & Das ( gen. aest. ) (28719/ H9 , NZCZSI) ; 1♂ , Dibang Valley , near Anini , 1381 m , 20.iv.2018 , leg . Ranjan & Das ( gen. vern. ) (28721/ H9 , NZCZSI) ; 1♀ , Dibang Valley , Anini , Maroli , 1680 m , 20.iv.2018 , leg . Ranjan & Das ( gen. vern. ) (28722/ H9 , NZCZSI) ; 1♂ , Dibang Valley , Anini , Etabe , 1397 m , 16.v.2018 , leg . Gayen & Tacho ( gen. aest. ) (28720/ H9 , NZCZSI) . Diagnosis. Forewing length: Male: 22.50–30.18 mm ( n = 5); Female: 26.15 mm ( n = 1). Summer form (gen. aest.) ( Figs 11, 12 ). P. erutae is closely similar to P. melaina and P. extensa bhutya but can be distinguished in having weakly dusted wing bases and veins (in P. melaina the wing base is heavily dusted and in P. extensa bhutya wings have pure white ground colour and unmarked forewing cell). The nominate subspecies P. e. erutae is distinct from its sister subspecies P. erutae wangchucki Tadokoro, Wangchuck & Wangdi, 2017 (distributed in Bhutan ) in reduced markings on upperside of the forewing, which are prominent in the latter. The female of P. erutae is distinct from the female of its closely similar species, P. melaina and P. extensa bhutya , in veins being moderately suffused with black scales on the upper surface whereas, in P. melaina the veins are heavily suffused and in P. e. bhutya the veins are suffused only on the marginal and submarginal areas. Spring form (gen. vern.) ( Figs 13, 14 ). In this form, the markings are weakly developed on upper surface whereas, the veins are more prominent on the under surface in comparison to the summer forms. The spring form of P. e. erutae is distinct from P. tadokoroi , sp. nov. by its larger size and weakly dusted veins on the under surface. Male genitalia ( Figs 36–38 , 45–47 , 54–56 , 62, 63 , 70–72 ). Male genitalia are variable in size, but are closely similar to P. tadokoroi , sp. nov. , P. ajaka and P. melaina , and the diagnostic characters are discussed under P. ajaka . Female genitalia ( Fig. 86 ). Female genitalia as discussed under P. ajaka . Androconia ( Figs 78–80 ). Closely similar to P. tadokoroi , sp. nov. , P. ajaka and P. melaina , but lamina neck is thicker in spring form than in summer form, and the diagnostic characters are discussed under P. ajaka . Distribution. NE India (including Sikkim ) to mountains of Vietnam , through SE China , Yunnan and Laos .