1918. j F. H. Gravely : Passalidae of the World. 95 



Pelopides monticulosus (Smith). 



Passalus monliculsus, Smith, 1852, p, 6, pi. i, fig. 1. 



Gnaphalocnemis monticulosus, Gravely, 1914c, pp. 249-250, pi. xiii, fig. 49«. 



Three specimens from Sumatra (two being from Beclagei Interior, ca. 6oo ft.), and a 

 number from Borneo (Mts. Kinabalu and Marapok). Length 39-45 mm. 



Pelopides tridens (Wiedemann). 



PI. 1. 



Passalus tridens, Wiedemann, 1823, pp. 109-110. 



Gnaphalocnemis tridens, Gravely, 1914c, p. 250, pi. xiii, figs. 50-50«. 



' Nine specimens from Sumatra (Bedagei Interior, ca. 600 ft. ; Gng. Talang, Padang 

 Interior ; Mt. Singalang) ; many from Java (Telaga Bodas, Garoet, 4,000-5,000 ft. ; G. Tji 

 Salimar, ca. 3,000 ft. ; Tji Bodas, Gng. Gede, ca. 4,000 ft., all in Preanger ; also Buitenzorg 

 and Tjandiroto) ; and one said to come from the Key Islands (near New Guinea). Length 

 46-56 mm. 



The species of Pelojndes may be identified as follows : — 



1' The anterior lower tooth of the right mandible small but distinct 

 I J in unworn specimens . . . . . . . . . . . . 2. 



( The anterior lower tooth of the right mandible absent . . . . . . 3. 



r The outer tubercles at least approximately symmetrical ; the 



anterior lower tooth of the right mandible larger . . P. symmetricus, p. 94. 



1 The inner angle of the right outer tubercle produced forwards 

 and inwards beyond that of the left ; the former acute, the 

 latter obtuse ; the anterior lower tooth of the right mandible 

 smaller . . . . . . . . . . P. gravidus, p. 94. 



The left outer tubercle consisting of a single, somewhat slender, 



obliquely truncate process ; the right one, of a similar but 



broader and slightly bifid inner process together with smaller 

 3-( pointed outer and middle processes . . . . . . P. simplex, (Gravely). 



Both tubercles consisting of two or three denticles more or less 



fused together, the tubercle as a whole being very broad 



on the right or on both sides . . . . . . . . . . 4. 



('The right and left outer tubercles of equal size, though not 

 4 J always of identical form . . . . . . . . P. dorsalis, p. 94. 



( The right outer tubercle much broader than the left . . . . . . 5. 



(The lacerai grooves of the elytra all narrow, simply punctured P. bur meisten, p. 94. 

 Grooves 5-7 of the elytra more or less broad ; each containing a 

 polished flattened band, which is marked by a single row of 

 punctures, and defined on either side by a more or less dis- 

 tinct roughened line with which the punctures may be to 

 some extent confluent . . . . . . . . . . . . 6. 



