62 TRYGAEUS JAVANICUS. 



the lateral raised margin ceases entirely at about one- 

 third of the length in front of the base. The scutellum 

 is large and quite smooth and shining. The elytra are 

 scarcely twice as long as the thorax; they are very deeply 

 sulcate, the interstices being strongly elevated and rather 

 narrow, the grooves are somewhat indistinctly crenate. 

 The legs are piceous-black , the sulcation of the tibiae is 

 very distinct. 



One specimen found on Mount Poentjak in West Java 

 by Mr. J. D. Pasteur, and belonging to the Leyden Museum. 



This species is somewhat closely allied to T. princeps m. ^) 

 but is narrower, and is more densely sculptured, has 

 deeper sulci on the elytra, with narrower interstices; the 

 outline of the prothorax is more irregular, and its sides 

 are less explanate. 



Although an insect of small size, the discovery of this 

 species of Trygaeus in the island of Java is of considerable 

 interest, as the genus is a very peculiar one , and hitherto 

 has only been found in Japan , where it is represented by 

 a single species. The idea seems to be prevalent in many 

 minds that the insect-fauna of Japan is more similar to 

 that of the Palaearctic region than to that of the Oriental 

 region. I am myself inclined to think that this will not 

 prove to be truly the case , and that when we know as 

 much of the fauna of the east as we do of that of Europe, 

 the insects of -Japan will be found to belong in greater 

 part to the former fauna. 



Cambridge, 12th February 1892. 



1) Trans. Ent. Soc. London, 1874, p. 420. — Ann. and Mag. of Nat. Hist, 

 (6) III, 1889. p. 467. — Aid Ident. Ins. PI. 133, fig. 3. 



Notes from the Leyden Museum, Vol. XIV. 



