Two new species of the genus Tarsonemus Canestrini and Fanzago, 1876 (Acari: Heterostigmatina: Tarsonemidae), namely T. narkelae Karmakar and Mondal sp. nov. (on Cocos nucifera L.) and T. mondouriensis Karmakar and Ganguly sp. nov. (on Oryza sativa L.), are described based on specimens collected from the lower Gangetic plains of West Bengal, India. T arsonemus narkelae Karmakar and Mondal sp. nov. was associated with sooty mould grown over honeydew and wax bloom secreted by rugose spiralling whitefly, Aleurodicus rugioparculatus Martin, 2004 on coconut leaves; T. mondouriensis Karmakar and Ganguly sp. nov. was associated with ripened rice grains and often with fungus-infested discoloured grains. http://www.zoobank.org/urn:lsid:zoobank.org:pub:86CFEFE6-597D-4736-B211-A451838D3E0A