Strongly resembling and about of the same length and development as the described specimen of Aegus Leeuweni Rits. 1) but narrower and more parallel-sided. The new species is at once recognizable by the two gibbosities on the fore-head which, no doubt, will be more conspicuous in more highly developed specimens. Moreover in the new species the basal outer angle of the mandibles is prolonged backward thus embracing the lateral angles of the head, and the anterior angles of the prothorax are rounded, not obliquely truncated. Length (with mandibles) 24,5 mm. — Black; shining with the exception of the opaque upper side of the mandibles and the fore-head as far as the top of the gibbosities, and of the closely punctured base and sides of the elytra.