The new species resembles B.herreri Lent & Wygodzinsky, 1979 from which it differs by the following characters: the color pattern, the rostral segments ratio, the shape of the post-ocular region of the head and the general shape of the pronotum, without the conspicuous angle in the lateral side where fore and hind lobes joint.
Belminus laportei sp.n.; Triatominae; Amazonian Basin