Revision of the Orbamia Herbulot, 1966 group of genera with description of two new genera, ten new species, and two new subspecies (Lepidoptera, Geometridae, Ennominae, Cassymini) Author Tujuba, Tesfu Fekensa Ethiopian Biodiversity Institute, Comoros street, Addis Ababa, Ethiopia & Department of Agriculture, Environment and Food Sciences, University of Molise, Via Francesco De Sanctis Campobasso, Italy Author Hausmann, Axel SNSB-Zoologische Staatssammlung Muenchen, Muenchhausenstr, 21, Munich, Germany https://orcid.org/0000-0002-0358-9928 hausmann.a@snsb.de Author Sciarretta, Andrea Department of Agriculture, Environment and Food Sciences, University of Molise, Via Francesco De Sanctis Campobasso, Italy https://orcid.org/0000-0002-9443-4816 text ZooKeys 2020 929 53 77 http://dx.doi.org/10.3897/zookeys.929.50391 journal article http://dx.doi.org/10.3897/zookeys.929.50391 1313-2970-929-53 D5E1D8E57DF3440893ED94CDE2C59FEA 6785C7A545C65EEF922F6A1FEF48EC3D Orbamia balensis Hausmann & Tujuba sp. nov. Figures 14 , 32 , 50 , 68 Examined material. Holotype : ♂, Ethiopia Oromia, Bale 8 km S. Dolo Mena, 1200 m, IV.2017, leg. R. Beck, coll. ZSM (ZSM G 20914). Paratypes : 2♂2♀, Ethiopia Oromia, Bale 8 km S. Dolo Mena, 1200 m, IV.2017, leg. R. Beck (ZSM G 20948/♀); 1♀, Aethiopien , prov. Oromia, Dolo Mena, 30 km, S., 1080 m (savanna) 06°13.53'N, 39°46.82'E, 14.IV.2019, Robert Beck (ZSM). Etymology. The name refers to the type locality in the Bale mountains. Differential features (COI sequences, photographs of adults and their genitalia see https://dx.doi.org/10.5883/DS-ORBAMIA): Adult: Forewing length: 11-13 mm. Upperside of wings: Ground colour comparatively dark, with much dark brown suffusion, pattern not well contrasted. Underside: Ground colour beige, with pale orange tinge on veins, apical spots on forewing conspicuous, sharply bordered, on hindwing slightly darker at apex only, remnants of dotted terminal fascia on all wings. Male genitalia: Uncus stout, very long, saccus broad, valva straight, 'very broad at base, narrow at tip, dorsal process stoutly sclerotised, with conspicuous, stout hook at tip, cornutus narrow and short (1.1 mm). Female genitalia: Lamella ante- and post-vaginalis fused, heart-shaped, short (length 0.6 mm), signum small, transverse ridge straight (0.2 mm). Figures 37-45. Male genitalia of the genus Orbamia . 37 Orbamia octomaculata 38 O. marginata 39 O. becki 40 O. renimacula 41 O. clarissima 42 O. clarior 43 O. obliqua 44 O. obliqua parva 45 O. ocellata . Scale bar: 1 mm.