Nemophas Thomson, 1864 is a genus of the subfamily Lamiinae, tribus Lamiini widespread from the Philippines to New Britain and Solomon Islands throughout Indonesia.
In the last revision, Iothocera Thomson, 1864 was recognized as a synonym of this genus.
Many thank to Gérard Chemin for his collaboration in sending many pictures.
This key is part of a paper available here (after request).
3. Dorsal side mostly covered with grey pubescence elytra with 2 transversal hairless bands, 26 mm, Moluccas: Morotai ... Nemophas incensus Pascoe, 1866 Francis P. Pascoe's drawing, 1866
-. Dorsal side mostly hairless; elytra with 1-3 transversal bands of whitish pubescence 4
6. Elytral pubescence missing on shoulders and along the lateral margin, 25–45 mm, New Guinea, Solomon ... Nemophas tomentosus (Buquet, 1858) Photo Gérard Chemin
-. Elytra with more or less distinguishable transversal hairless bands, 30 mm, Moluccas: Bacan ... Nemophas leuciscus Pascoe, 1866 Francis P. Pascoe's drawing, 1866
9. Pronotum covered with a red pubescence, except for a longitudinal hairless black band; elytral spots whitish yellow, 26–46 mm, New Britain ... Nemophas benningseni Aurivillius, 1908
-. Pronotum uniformly covered with ochreous pubescence; elytral spots ochreous, 31-35 mm, Lesser Sunda: Sumba ... Nemophas sumbaensis Vitali, 2013 Photo Francesco Vitali, coll. Wolfgang Heinkel, Syntype
14. Elytra covered with irregular transversal bands of red pubescence, 23–45 mm, Moluccas: Tanimbar, Kai ... Nemophas forbesi Waterhouse, 1884 Photo Gérard Chemin
-. Elytra hairless, at the most covered with small spots of ochreous pubescence ... 15