Mythimna (Hyphilare) semicana Pagenstecher comb. n.

Aletia aroroyensis Calora, 1966: 688.

Leucania pseudoformosana Robinson, 1975, Macrolep. Fiji, Rotuma p. 116, syn. n.

The male genitalia indicate conspecificity of pseudoformosana with aroroyensis.
Hacker et al. (2002: 165) placed aroroyensis as a synonym of M. semicana Pagenstecher, to which Robinson (1975) stated his pseudoformosana Robinson was closely related. However, Hacker et al. excluded pseudoformosana from the synonymy of semicana, indicating that populations from Fiji were distinct. Edwards in Nielsen et* al*. (1996) listed xanthosticha Turner as a synonym of semicana, but without mention of aroroyensis. Edwards drew attention to the fact that the female genitalia of pseudoformosana resembled most closely those of formosana Butler, whereas the male genitalia were closer to those of semicana.