1918.] F. H. Gkavely : Passalidae of the World. 87 



and Mandi) ; by Mr. C. Beeson from Kumaon (Ramgarh, 6,000 ft., under bark of dead 

 oak) ; by Dr. B. L. Chaudhuri and myself from the Darjiling District (Senchal, ca. 8,000 ft., 

 and Pashok 5,500 ft.) ; by Mr. S. W. Kemp from the Khasi Hills (Shillong 6,400 ft., and 

 Maflong, 5,900 ft.) ; and by M. Vitalis de Salvaza from Tonkin (Lao Kay). 



One specimen labelled " Darjeeling " in the Van de Poll collection is only 28-5 mm. 

 long. All the remaining Himalayan specimens are 30 mm. long or over. The Manipur 

 specimen is 30 mm. long ; all the remaining specimens found east of the Darjiling District 

 are 29 mm. long or under. Although, therefore, occasional specimens may transgress the 

 normal limits of the race characteristic of their locality, the validity of difference in size as 

 a distinction between 0. cantori, s. str., and its sub-species convexifrons is confirmed. The 

 form of mentum, on the other hand, described as distinctive of the sub-species dunsiriensis, 

 does not appear to be a good character, and although specimens from the Dunsiri valley 

 range from 28 to as much as 31 mm. in length I think that they can best be regarded as 

 belonging to the sub-species convexifrons. 



Ophrygonius birmanicus, Gravely. 



Ophrygonius birmanicus, Gravely, 1914c, p. '226. text-fig. 3A. 



One specimen from the Ruby Mines District of Upper Burma. Another has been 



presented by Mr. J. Coggin Brown from Man Lorn, Homang, N. Tawngpeng, N. Shan States, 



Upper Burma, 4,500-5,500 ft. ; and others by M. Vitalis de Salvaza from Chapa, Ht. Tonkin, 



Length 29-33-5 mm. 



Ophrygonius singapurae, Gravely. 



Ophrygonius singapurae. Gravely, 1914c, pp. 226-227, text-fig. 3B. 



One specimen from Laos, and two from Mt. Marapok, Dent Province, British North 

 Borneo. Length 30-5-32-2 mm. 



In fresh specimens the anterior lower teeth each have their apices produced into a 

 sharp and slender point. The left outer tubercle is distinctly thicker at the base than in 

 the preceding species, but may point more definitely inwards than in the type specimen. 



Ophrygonius wallacei (Kuwert). 



Heterochilus Wallacei 4- crinitus + oculitesselatus, Kuwert, 1898, p. 334. 

 Aceraius wallacei, Gravely, 1914c, pp. 228-229, pi. xii, figs. 26-266. 



One specimen from Singapore and a number from Borneo (Mts. Kinabalu and Marapok). 

 Length 33-5-38-0 mm. 



The anterior lower tooth on each side is much broader than the lowest terminal. Both 

 are small on the right mandible, but are perfectly distinct in fresh specimens. 



Ophrygonius inaequalis (Burmeister). 



PI. I. 



Passalus inaequalis, Burmeister, 1847, p. 468. 



Ophrygonius inaequalis, Gravely, 1914c, pp. 227-228, pi. xii, figs. 24-24«. 



A number of specimens from Mt, Marapok, Dent Province, British North Borneo ; 

 and one from Mt. Kinabalu. Length 23-27 mm. 



The punctures in the lateral grooves of the elytra are variable, and I no longer think it 

 .at all likely that oroleius, Smith, will have to be recognized as a distinct variety. 



