Fifth contribution to the study of the Lithosiini of Gabon: two genera new for Gabon, with a description of two new species (Lepidoptera: Erebidae: Arctiinae)

Pusiola celida Bethune-Baker, 1911 and Novilema fluminale Durante & Panzera, 2001b are recorded for the first time in Gabon; the synonymy of the subspecies P. celida celida Bethune-Baker, 1911 and P. unipunctana maior Durante & Panzera, 2002a is revised; two species are described as new: Pusiola unicolor Durante new species and Novilema bifurcum Durante new species. The exclusion of Archilema triangulare Durante & Panzera, 2001b from the genus Novilema Durante & Panzera, 2001b is discussed together with criteria for assigning four species of the genus Archilema BirketSmith, 1965 to the subgenera identified by Birket-Smith (1965). These species are as follows: Archilema (Archilema) lucens Durante & Panzera, 2002c; Archilema (Archilema) subalba Durante & Panzera, 2001b; Archilema (Palilema) quadrilobata Durante & Panzera, 2001b; Archilema (Palilema) triangularis Durante & Panzera, 2001b.