1914-] F- H. Gravely : An Account of the Oriental Passalidae. 291 



Aceraius laevimargo, Zang. 



Passalus emarginaius, Burmeister, 1847, pp. 463-4. 

 {Passalus emarginatus , [part], Geoiminger and Harold, 1868, p. 982.) 

 (Aceraius emarginatus [part], Wytsman, 1884, p. 336.) 



Aceranis f laevimargo, Zang, 1905«, pp. 244-5. 



Aceraius \ laevimargo , Gravely, above, p. 235. 



Localities : — 

 Sumatra. 

 Borneo: Mt. Kina-Balu, c. 5000 ft. 



Aceraius pilifer (Percheron). 



Passalus pilifer. Percheron, 1835, pp. 23-4, pi. ii, 6g. 2. 



Passalus pilifer , Percheron, 1841, p. 3. 



(Aceraius emarginatus [part], Gemminger and Harold, 1868, p. 972.) 

 (Aceraius emarginatus [part], Wytsman, 1884, p. 336.) 

 {Aceraius pilifer, Kuwert, 1891, p. 166.) 



Aceraius emarginatus + f reticulaticollis + fborneanus + ? nicobaricus, Kuwert, 1898, pp. 346-8. 



Aceraius -f pilifer. Gravely, above, pp. 235-236, pi. xii, fig. 35. 



The name nikoharicus Redtenbacher (1867, p. 94) ought I think to be allowed 

 to drop altogether, so I insert it here for reference. Redtenbacher states that 

 in his insect the head is symmetrical, and his description, tmtil he comes to the 

 elytra, seems to me to be that of Tiberius nicobaricus and not that of an Aceraius at 

 all. When he comes to the elytra, however, there can be no doubt that he is 

 dealing with an Aceraius as stated by Stoliczka (1873, p. 158), followed by Kuwert. 

 The head and pro- and meso-thorax of a Passalid often get detached from the re- 

 mainder of the body, and there can I think be little doubt that his type was a 

 mixture of two different insects. Kuwert appears to have examined a complete insect 

 of the genus Aceraius which he supposed came from the Nicobars ; but in view of 

 Kuwert' s frequent inaccuracies and of the fact that no-other specimen of the genus 

 ever seems to have been recorded either from the Andamans or from the Nicobars 

 some confirmation of the locality record is desirable. 

 Localities :— 



?? Nicobars. 



Sumatra. 



Java : Tjibodas, ca. 5000 ft. ; Preanger, 4-6000 ft. 



Borneo. 



Aceraius alutaceosternus, Kuwert. 



? Aceraius emarginatus [part], Kaup, 1868a, p. 27. 

 ? Aceraius emarginatus [part], Kaup, 1868&, p. 3. 

 ? Aceraius emarginatus [part], Kaup, 1871, p. 53. 



Aceraius f emarginatus [part], Stoliczka, 1871, p. 158. 



Aceraius alutaceosternus , Kuwert, 1898, pp. 347-8. 



Aceraius ^alutaceosternus, Gravely, above, p. 236, text-tig. 4E, pi. xii, figs. 34-34«. 



