Nymphicula nyasalis is a species of moth of the Crambidae family. It was described by Hampson in 1917. It is found in the Republic of Congo, Malawi and Tanzania. The wingspan is 9–14 mm. The base of the forewings is fuscous. There is an orange subbasal fascia followed by a whitish fascia, separated by fuscous scales. The hindwings are whitish, irrorated with fuscous.