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Studies on the current insecticide susceptibility status of Cidex quinquefasciatus against few conventional insecticides, i.e., DDT and Dieldrin, and more potent ones, i.e., malathion, fenitrothion, propoxur and permethrin, were carried out in three desert districts (Barmer, Jodhpur and Pali) and three non-desert districts (Ajmer, Kota and Udaipur) in Rajasthan. The results of the investigations revealed that this vector species was no longer susceptible to any of the tested insecticides. In desert districts, the species exhibited resistance to DDT, dieldrin and malathion (mortalities <80%) and intermediate resistance to fenitrothion, propoxur and permethrin (mortalities 80-98%). However, in non-desert districts, the species, besides resistance to DDT, dieldrin and malathion, had also developed resistance to propoxur (mortalities <80%), but it exhibited intermediate resistance to fenitrothion and permethrin (mortalities 80-98%).