Abstract
This paper deals with the Indian species of the genus Opius Wesmael. Nineteen new Indian species of the genus Opius are described. These are: Opius (Allophlebus) tobiasi sp. nov., O. (Apodesmia) crenulatus sp. nov., O. (Apodesmia) poonchensis sp. nov., O. (Gastrosema) aligarhensis sp. nov., O. (Gastrosema) biharensi sp. nov., O. (Gastrosema) indicus sp. nov., O. (Hypocynodus) sternaulatus sp. nov., O. (Merotrachys) declivous sp. nov., O. (Merotrachys) shafeei sp. nov., O. (Merotrachys) whartoni sp. nov., O. (Nosopaeopius) longiterebrata sp. Nov., O. (Opiothorax) bareilliensis sp. nov., O. (Opiothorax) gahani sp. nov., O. (Opius) mashhoodi sp. nov., O. (Pendopius) achterbergi sp. nov., O. (Phaedrotoma) pappi sp. nov., O. (Phaedrotoma) patnaensis sp. nov., O. (Phaedrotoma) seticlypeus sp. nov., and O. (Tolbia) granulatus sp. nov. Material pertaining to four species namely O. raoi, O. volaticus, O. diacriticus and O. travancorensis has been recorded. A key to the Indian subgenera and species of Opius is provided.