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Abstract
In West Africa, the subgenus Adenophlebiodes s.s. comprises five species divided into two groups: A. (A.) ornatus (Ulmer), A. (A.) massirius sp. n. and A. (A.) adrieni sp. n. for A. (A.) ornatus group, A. (A.) rubeus sp. n. and A. (A.) callasae sp. n. for A. (A.) decoratus (Navás) group. One of these species, A. massirius is widely distributed from Guinea to Togo and is found in plains as well as at medium altitude, in savanna and in forest areas; the other species are less widespread. In the area of our study, A. (A.) decoratus known from Central Africa has not been recorded. In the same way, we did not find A. (A.) bicolor the presence of which in West Africa seems therefore unlikely. This species belongs to the A. decoratus group. Examination of the specimens and the existing descriptions make it possible to establish a key to the species.