Phylloscopus griseolus Blyth, 1847 - Sulphur-bellied Warbler
This is also known as the Olivaceous Leaf warbler.
Phylloscopus tytleri W.E. Brooks, 1871 - Tytler's Leaf Warbler
This species is listed as Near Threatened in the IUCN Red List of Threatened Species (https://www.iucnredlist.org/)Phylloscopus sindianus W.E. Brooks, 1880 - Kashmir Chiffchaff
This is also known as the Mountain Chiffchaff (incl. P. lorenzii).
Phylloscopus fuligiventer (Hodgson, 1845) - Smoky Warbler
This is also known as the Smoky Leaf Warbler.
Phylloscopus fuscatus (Blyth, 1842) - Dusky Warbler
This is also known as the Dusky Leaf Warbler.