The current paper presents new locality records, including first state records for Mizoram and Nagaland, of 50 species of Sericini (Coleoptera: Scarabaeidae: Melolonthinae) from the Indian subcontinent. Nine new species are described herein: Maladera naveeni sp. nov., M. sujitrae sp. nov., M. thirthahalliensis sp. nov., M. viraktamathi sp. nov., Neoserica (s. lat.) reuteri sp. nov., Oxyserica goertzae sp. nov., Selaserica hosanagarana sp. nov., Serica (s. str.) eberlei sp. nov. and S. (s. str.) tashigaonensis sp. nov.