A new eriophyoid mite Unilox lataguriensisgen. nov. et sp. nov. on Ardisia solanacea (Poir.) Roxb. (Primulaceae) is described here from Jalpaiguri district of sub-Himalayan West Bengal, India. The new genus, belongs to the family Diptilomiopidae, subfamily Diptilomiopinae, and is very close to the genus Dialox.