A revision of the Afrotropical species of the genus Crambus. II: The tenuistriga species group and description of two new species of the ellipticellus and averroellus groups (Lepidoptera Pyralidae). Bollettino della Societa Entomologica Italiana, 132(3), Settembre-Dicembre 2000: 249-258. 257 [Zoological Record Volume 137]