Abstract: During entomological surveys conducted by the author in the whole of Balochistan Province Sergentomyia (Sergentomyia) mervynae, Pringle, 1953 was collected (N=19) from four localities. These localities appear to be the new record of this species in the literature to-date. This is to the author`s knowledge the first record of this species from Pakistan. Taxonomic characters not described by earlier workers are described and illustrated. Results are compared with the data available in the existing literature. Differential diagnosis of this species is also given.