I9n4-J F. H. GravEIvY : An Account of the Oriental Passalidae. 251 



right mandible. Mentum punctured laterally only. Head crossed by band of large 

 sparse punctures immediately in front of parietal ridges ; parietal ridges extending 

 directly outwards on either side of central tubercle ; frontal ridges extending at first 

 more outwards than forwards from central tubercle, then bent abruptl}^ towards inner 

 tubercles; ridge between these slightly produced forwards in middle line, which is 

 marked in frontal area by an indistinct ridge ; left outer tubercle broad, parallel-sided, 

 truncate distally, the extremity being slightly concave as seen from above, straight and 

 perpendicular from the side ; right outer tubercle of equal length but more slender, sides 

 as seen from above abruptly converging near end to meet each other in a right angle, 

 upper surface longer than lower, the process being obliquely truncate as seen from the 

 side ; anterior angle of head containing about 100° ; canthus almost equilaterally 

 quadrangular. Pronotum with strong median groove, marginal groove incomplete in 

 middle in front, obsolete in middle behind. Prothorax below polished; hairy and 

 indistinctly punctured close to margin in front, more distinctly punctured behind. 

 Scutellum smooth and polished ; mesothoracic episterna polished throughout, punctured 

 above and along anterior margin ; mesosternum smooth and polished , with small deep 

 scars. Metastermim finely punctured in lateral areas, which are very little wider 

 behind than in front and are not in contact with central area ; more strongly punc- 

 tured in anterior intermediate areas ; coarsely punctured in posterior intermediate 

 areas. Hind coxae and abdominal sterna polished, almost unpunctured. Elytra finely 

 punctured in dorsal grooves, more coarsely in lateral ones. 



Subfamily LEPTAULACINAE. 

 Genus LEPTAULAX, Kaup. 

 Leptaulax beccarii, Kuwert. 

 Described from two specimens from Sumatra in the Berlin collections, one of 

 them determined by Kuwert. 



Description. — Length 21 mm Differs from L. humerosus in the following char- 

 acters only. Frontal area of head shorter and broader. Pronotum and abdominal 

 sterna more as in L. dentatus, the latter not extensively punctured. Posterior parts 

 of hind coxae smooth. Sculpturing of lateral grooves of elytra reduced (to a variable 

 extent) in a somewhat different way, a polished tubercle being more or less distinctly 

 developed from the middle part of each of the partly obsolete transverse ridges. 



Leptaulax humerosus, Kuwert. 

 PL xiii, fig. 51. 

 Regd. No. '^^—^ Ten miles south of Kuching, Sarawak C. W. Beebe. 



There is a single specimen from Kuching in the Sarawak Museum collection and 

 another from the same locality in Mr. Andre wes' collection. I have also examined 

 specimens from Perak, DeH, W. Sumatra, Ardjoeno, and Tengger Mountain in the 

 collection of the Deutsches Entomologisches Museum. 



Description — Length 15-20 mm. Differs from the common allied species, L. 



