The discovery of three colonies of the libellulid Nesciothemis nigeriensis Gambles in the region of Zaria, Nigeria, is reported. The species was known hitherto only through the type specimen which was taken in 1961, much further south in Nigeria. The males of N. nigeriensis are strongly territorial at the waterside; females are seen only occasionally by water. The preferred habitat seems to be marshy lake margins having a good growth of emergent grasses, especially Echinochloa. Both sexes roost in tall grass, mostly away from the water. GAMBLES (1966) described a new species of Nesciothemis Longfield (Odonata: Libellulidae) from a single male specimen which he took at Agulu Lake, Awka, in East Central State, Nigeria in 1961. The species, A. nigeriensis, remained known only from the type specimen until 29 June, 1971, when we took a mature male at about 5.30 pm local time at University Farm Lake*, Samaru, Zaria in North Central State, Nigeria. This specimen was determined by Gambles. Figure 1 is a photograph of a living adult male of N. nigeriensis.