The males of Timulla chrysea Mickel, 1938, Timulla continua Mickel, 1938, and Timulla segesta Mickel, 1938, and the female of Timulla tumidula (Cameron, 1894) are described and illustrated. Timulla chrysea and T. tumidula are reported for first time from Panama. The following synonyms are presented: Timulla orthona (Cameron, 1894), male, is a junior synonym of Timulla lilea (Cameron, 1894), female; Timulla talus (Cameron, 1894), male, is a junior synonym of Timulla subrobusta (Cameron, 1894), female. Observations on mating behavior for Timulla runata Mickel and Timulla cordillera Mickel, 1938 are described. Flight seasonality of Timulla labdace Mickel, 1938 is discussed. Keys and a checklist for the 16 species of Timulla from Panama are presented.