Review of the Orphninae (Coleoptera: Scarabaeidae) of Sri Lanka, with description of a new species of genus Orphnus Macleay, 1819 Author Frolov, Andrey V. 5DEE612B-4252-4DB0-AD5E-BAA789A3C355 Laboratory of Insect Systematics, Zoological Institute, Russian Academy of Sciences, Universitetskaya nab., 1, St. - Petersburg, 199034 Russia. frolov@scarabaeoidea.com Author Akhmetova, Lilia A. BA35DDDD-6E6A-47A4-AB73-965EB4A92CC3 Laboratory of Insect Systematics, Zoological Institute, Russian Academy of Sciences, Universitetskaya nab., 1, St. - Petersburg, 199034 Russia. akhmetova@scarabaeoidea.com text European Journal of Taxonomy 2021 2021-09-06 767 1 40 54 http://dx.doi.org/10.5852/ejt.2021.767.1485 journal article 4209 10.5852/ejt.2021.767.1485 66e2d72d-ad54-494d-80e6-56b6020ef450 2118-9773 5514853 9B651F61-7F2B-4D46-9390-4F54F8AEB0AE Key to species of Orphnus from Sri Lanka (males) 1. Pronotum with more or less developed tubercle on base medially ( Figs 1A–B , 2A–C , 3A–C ). Endophallus with 1 group of spinules ( Figs 1G , 3G ) ....................................................................... 2 – Pronotum without tubercle on base medially ( Figs 4A, H , 5A, H ). Endophallus with more than 1 distinct group of spinules ( Figs 4D , 5D ) .......................................................................................... 3 2. Larger: body length 8.0–10.0 mm. Spinules of endophallus as a rather dispersed group of more than 10 spinules ( Fig. 1G ). Tubercle on base of pronotum normally with 2 punctures; punctures may be close to each other or indistinct in some specimens ............. Orphnus mysoriensis Westwood, 1845 – Smaller: body length 4.6–6.0 mm. Spinules of endophallus in a compact cluster consisting of less than 10 spinules ( Fig. 3G ). Tubercle on base of pronotum smooth ...... Orphnus medvedevi sp. nov. 3. Parameres in dorsal view with small but distinct notches basad of lateral teeth ( Fig. 4F ). Parameres longer, about 0.7 length of phallobase ( Fig. 4E ). Abdominal sternite 8 medially longer than sternites 4–7 combined ............................................................................... Orphnus bicolor ( Fabricius, 1801 ) – Parameres in dorsal view without notches basad of lateral teeth ( Fig. 5G ). Parameres shorter, about 0.5 length of phallobase ( Fig. 5F ). Abdominal sternite 8 medially as long as sternites 4–7 combined .................................................................................. Orphnus parvus ( Wiedemann, 1823 )