Sergentomyia (Sergentomyia) pondicheriiensis is a new species of phlebotomine sand fly belonging to the genus Sergentomyia and subgenus Sergentomyia is described with illustrations of adult females and males. Other six species under the subgenus Sergentomyia are Se. (Ser.) punjabensis (Sinton), Se. (Ser.) dentata (Sinton), Se. (Ser.) theodori (Parrot), Se. (Ser.) murgabiensis (Perfiliew), Se. (Ser.) mervynae Pringle, and Se. (Ser.) fallax afghanica Artemiev. Sergentomyia pondicherriensis sp. nov was collected from termite mounds, in one of the villages of Puducherry Union Territory, Southern India. A revised key to the species of the subgenus Sergentomyia is also included.