90 Memoirs of the Indian Museum. [Vol. VII, 



Kay in the same country, and from Cambodia. Mr. J. Coggin Brown has presented 

 specimens from Loi Tawng Kyaw 5,500-7,000 ft., Man Lorn, Hamang 4,500-5,500 ft., and 

 between Man Lorn and Man Hpat, 4,500-5,500 ft., all in Tawnpeng in the Northern Shan 

 States, Upper Burma. Mr. Holman-Hunt has sent for examination a specimen said to 

 come from the Malay Peninsula (Ulu Gombak) and M. Guy Babault one said to come from 

 Sumatra (Médan). Length 29-3-37-2 mm. 



I have already pointed out (1914c, p. 292 footnote) that A. tavoyanus, from Southern 

 Tenasserim, is not really distinct from A. helfen from further north. The series from 

 Tonkin shows in addition that A. assamensis, and A. himalayensis are no more than 

 imperfectly separated local races of the same form. Specimens from northerly localities 

 (see pi. i, " Aceraius, other spp.") ordinarily have much squarer and less slender left outer 

 tubercles than have specimens from further south. But the shape of this tubercle is not 

 altogether constant in specimens from a single locality ; and the gradation of the southern 

 form into the northern seems to be so complete as to render impossible the separation of the 

 species even into two definite races. 



Aceraius alutaceosternus, Kuwert. 



Aceraius alutaceosternus, Kuwert, 1898, pp. 347-348. 



Aceraius alutaceosternus, Gravely, 1914c, p. 236, text-fig. 4E, pi. xii, figs. 34-34a. 



One specimen from Perak and one from Borneo. Mr. C. Holman-Hunt has presented 

 .a specimen from Bukit Kutu in the Malay Peninsula. Length 35-4-39-5 mm. 



The shape of the left outer tubercle of this species is the same as that of the most 

 extreme form found among southern specimens of the preceding, of which it is little more 

 than a local race. The size of the posterior convexity of the upper margin of the left 

 mandible, and the faint median groove on the anterior part of the mentum, appear, however, 

 to afford constant distinctive characters by which it may be recognized. 



Aceraius borneanus, Kaup. 



Aceraius borneanus, Kaup, 1871, p. 52. 



Aceraius borneanus, Gravely, 1914c, pp. 238-239, pi. xii, figs. 25-256. 



One specimen from the Malay Peninsula (Pahang), four from Sumatra (three being 

 from the interior of Bedagei on the east coast, ca. 600 ft.), many from North Nias (Hili 

 Madjedja and Go Madjeja), five from Middle Nias (Dyma and Kalim Bungo), one from Java, 

 and many from Borneo (Doesonlanden, Brunei, and Mts. Marapok and Kinabalu). Mr. 

 C. Holman-Hunt has presented a specimen from Ulu Gombak, Malay Peninsula. Length 

 23*0-29-2 mm. 



This species appears to be somewhat rare in the Malay Peninsula and Java, but to be 

 abundant in Sumatra and Borneo. 



Aceraius pilifer (Percheron). 



Passalus yrilifer, Percheron, 1835, pp. 23-24, pi. ii, fig. 2. 

 Aceraius filifer, Gravely, 1914c, pp. 235-236, pi. xii, fig. 35. 



Numerous specimens from the following places in Java : Tji Bodas : ca. 4,000 ft. ; 

 Pengalengan, 4,000 ft. ; Mt. Tjikorai, 4,000 ft. ; Mt. Gede, 4,000 ft. : Telaga Boclas 



