A study on mosquito fauna in three foot hill villages on the western side of Sirumalai hills, Dindigul, Tamilnadu was carried out for the period of six months. Both resting and biting adults and immature forms were collected. A total number of 505 mosquitoes belonging to 12 species of 4 genera were identified. The alpha diversity index calculated for the three villages did not vary much. It was high in Thoppampatti (0.91) and least in Valaiyapatti village (0.69). The dominant species was Armigeres subalbatus (48.11%) followed by the two important vectors, Aedes aegypti (13.66%) and Culex quinquefasciatus (11.62%).
