AEGUS BIGIBBOSUS. 185 



NOTE XX. 

 TWO NEW SPECIES OF LUCANOID COLEOPTERA 



DESCRIBED BY 



C. RITSEMA Cz. 



Aegus higihhosus , n. sp. 



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) 24,5mm. — Black; shining 

 with the exception of the opaque upper side of the man- 

 dibles and the fore-head as far as the top of the gibbosities, 

 and of the closely punctured base and sides of the elytra. 



The mandibles are as long as the head and regularly 

 curved on the outside; they are very broad at the base 

 where they are provided on the inside with a process 

 which is slightly eraarginate at the tip; between this 

 process and the tip the mandibles are strongly and regularly 



I) Notes Leyd. Mus. IV, 1882, p. 164 and XV, 1893, pi. 2, fig. 6. 



r^otes from the Leyden Museum, Vol. XIX, 



12** 



