Three new species of Metrocoris Mayr, 1865 (Heteroptera: Gerridae) from India and establishment of species groups Author Jehamalar, E. Eyarin Zoological Survey of India, New Alipore, Kolkata- 700053, West Bengal, India Author Dash, Swetapadma 0000-0002-0723-549X Zoological Survey of India, New Alipore, Kolkata- 700053, West Bengal, India & oasisnainital @ yahoo. co. in; http: // orcid. org / 0000 - 0002 - 0723 - 549 X oasisnainital@yahoo.co.in text Zootaxa 2021 2021-12-20 5082 4 341 356 journal article 2898 10.11646/zootaxa.5082.4.3 41d2a753-a2e7-48cc-bcfa-dc33f2ef1af7 1175-5326 5792709 65FCF485-9671-4F37-86D3-B1ED3D7F51D0 Metrocoris coxalis group Diagnosis. The venter of body black, except the mesosternum mediolaterally with a yellowish-brown mark on each side directed anteriorly and posteriorly ( Figs. 2C , 3B ), the posterior region of the abdominal venter yellowish-brown ( Figs. 2C, F, H , 3B, G, I ); the male fore femur is slender, the flexor region almost medially with a small notch and mostly with a few setae basally (see Tran and Polhemus 2017 , Fig. 100); the hind coxa or both the hind coxa and the hind trochanter with a slender process or the hind trochanter is slightly produced in female ( Figs. 2B, I , 3C, J ; Chen & Nieser 1993 b, Fig. 204; Tran & Polhemus 2017 , Fig. 106), the flexor region of the hind femur basally or sub-basally usually with a fringe of setae in the female ( Figs. 2I , 3J ; Tran & Polhemus 2017 , Fig. 106); the proctiger of the male is sub-ovate, mediolaterally widened ( Figs. 2L , 3L ); the paramere is falciform, the dorsal region nearly middle is slightly raised usually with some setae ( Figs. 2N , 3N ; Chen & Nieser 1993 b, Figs. 193, 194; Tran & Polhemus 2017 , Figs. 101, 102); the proximal region of the dorsal sclerite with a reflex angled process, the ventral sclerite of endosoma is long, surpassing well beyond the level of the lateral sclerite in the lateral view ( Fig. 2O , Chen & Nieser 1993 b, Fig. 200, Tran & Polhemus 2017 , Fig. 104); the sternum VII of the female is constricted laterally and is completely covering the genital segments ( Figs. 2H , 3I ; Tran & Polhemus 2017 , Fig. 107). Included species. M. coxalis Chen & Nieser , M. issaci sp. nov. , M. josephi sp. nov. and M. nigriventris Tran & Polhemus. Distribution. India (NE), Myanmar , Vietnam .