This paper reports on 12 species of Phytoseiidae (Acari: Mesostigmata) from West Bengal, India. Amblyseius crotalariae (Gupta, 1977), Amblyseius guajavae (Gupta, 1978), Typhlodromips syzygii (Gupta, 1975), Scapulaseius asiaticus (Evans, 1953) are re-described, and Scapulaseius moraesi sp. nov., Euseius sundarbanensis sp. nov., Euseius astrictus sp. nov., Asperoseius latericulus sp. nov., Asperoseius jujubae sp. nov., Typhlodromus (Anthoseius) carambolae sp. nov., Typhlodromus (Anthoseius) heliotropium sp. nov. and Phytoseius namkhanaensis sp. nov. are described as new.

This paper reports on 13 species of Phytoseiidae (Acari: Mesostigmata) from West Bengal, India. Eight species, namely Euseius alstoniae (Gupta, 1975), Paraphytoseius orientalis (Narayanan, Kaur & Ghai, 1960), Amblyseiulella heveae (Oudemans, 1930), Gynaeseius ricini (Ghai & Menon, 1969), Neoseiulus longispinosus (Evans, 1952), Neoseiulus imbricatus (Corpuz & Rimando, 1966), Neoseiulus barkeri Hughes, 1948 and Phytoseius kapuri Gupta, 1969 are re-described, and five species, Typhlodromips jhilimiliensis sp. nov, Typhlodromips neosyzygii sp. nov, Proprioseiopsis amari sp. nov, Typhlodromus (Anthoseius) bolpurensis sp. nov, and Phytoseius mauritiana sp. nov. are described as new. Neoseiulus barkeri Hughes, 1948 is reported from India for the first time.

Aceria tulipae is one of the most damaging mite pests of garlic in the Gangetic Basin of West Bengal. The mite causes damage by infesting along the midrib of leaf. The leaves of infested plants are curled and twisted in a characteristic manner, and growth is stunted, causing 32% yield loss in this study under West Bengal conditions. The mite causes devastating damage to stored garlic also. Mite population initiated at the end of December and attained maximum numbers during mid-February. The garlic cultivar, Katki, was recorded as tolerant, whereas Goldana was susceptible to the mite attack. Ambient temperature and relative humidity were positively correlated with the mite population, whereas rainfall was correlated negatively.

Five mite species belonging to the family Phytoseiidae (Acari: Mesostigmata), namely, Amblyseius andamanicus Karmakar and Biswas sp. nov., Amblyseius reticulatus Karmakar and Biswas sp. nov., Euseius jhinukae Karmakar and Biswas sp. nov., Euseius madhubanensis Karmakar and Biswas sp. nov., and Ueckermannseius samudricus Karmakar and Biswas sp. nov., are discovered as new to science and are described based on specimens collected from plants amidst the lush green and dense tropical evergreen rainforest areas of the Andaman and Nicobar Islands. A new species group samudricus under the genus Ueckermannseius is proposed. Zoobank registration numberhttp://www.zoobank.org/urn:lsid:zoobank.org:pub:D365B615-0D5F-4FC9-A688-C5B4BBD7E15F

A rapid roving survey was conducted during March 2019 to explore the phytoseiid mites from Sundarban, part of the coastal southern district of South 24 Parganas, West Bengal. Our survey, which focused on plants of economic importance in the region, revealed 13 phytoseiid species, of which three were new to science. These new species, namely Euseius sajnekhalicus sp. nov., Proprioseiopsis indicus sp. nov. and Typhlodromus (Anthoseius) gosabaensis sp. nov., are described and illustrated. http://www.zoobank.org/urn:lsid:zoobank.org:pub:1305882D-79F2-48D4-B592-0F6227A2687F

Two new species of Floridotarsonemus Attiah, 1970 (Acari: Heterostigmatina: Tarsonemidae), F. kukri Karmakar & Mondal sp. nov. and F. kanthali Karmakar & Mondal sp. nov. are described based on the specimens collected from Rhododendron indicum (Ericaceae), Cinchona officinalis (Rubiaceae) and Artocarpus heterophyllus (Moraceae) in Central Himalayan biogeographic province located in Darjeeling and Kalimpong district and Nadia district in the new alluvial zone of West Bengal, India. This registers the first record of Floridotarsonemus from the Indo-Malyan biogeographic realm. A note on the generic diagnosis of Floridotarsonemus and keys to differentiate the species of world Floridotarsaonemus are provided.