author(s)
Dr. K Rama Rao, Dr. D Prasanna and D Amaravathi

abstract
An investigation was carried out to study the Aquatic Entomofauna of their diversity and distribution in Lower Manair Dam for a period of two years from August 2016 to July 2018. The diversity of aquatic insect fauna of a total 3647 individuals representing to classified under 22 families and 37 Taxa in seven orders were recorded. The aquatic insects were sampled systematically and randomly in station-wise habitats, using the standard protocols. Among the collected insects recorded order Hemiptera dominated with eight families which contributed to (36.36%) followed by Odonata (18.18%), Coleoptera, Ephemeroptera each with (13.64%), Trichoptera, Megaloptera each with (4.55%) and Diptera (9.09%). Recorded genera out of 37 species, Hemiptera were contributed to (37.84%), Odonata (27.03%), Coleoptera (16.22%), Diptera (5.41%), Ephemeroptera (8.11), Trichoptera and Megaloptera each with (2.70%). The month and season wise Entomofauna density calculated by using Shannon -Wiener diversity index from the number of population was represented.