DE. F. LBUTHNER ON THE ODONTOLABINI. 459 



was enabled to bring together the various male forms, which are mostly to be found 

 singly in various museums. The specimens figured on PI. XCIII. figs. 5, 6, 9, were 

 collected by Mr. H. O. Forbes in Balacud, in the Residency of Palembang, at an 

 elevation of 5300 feet, and I am much indebted to him for the kind permission to 

 figure and describe them. I am only acquainted with two other specimens of the new 

 and interesting form pectinatn, both from Lahat, in the Museums of Leyden and 

 Amsterdam, the latter of which agrees with fig. 7 in colour. 



17. Odontolabis voLLENHOVENi, Parry. (Plate XCIII. figs. 1-3, c? ; fig. 4,?.) 

 (J . Odontolabis voUenhovii, Parry, Trans. Ent. Soc. Lond. (3), ii. p. 13, pi. viii. fig. 13 (good figure). 



Male. Very like 0. wollastoni, but larger ; elytra orange-yellow, the black mark still 

 narrower than in 0. ludeJcingi, running parallel with the suture, and ending in a point ; 

 under-surface and legs entirely black ; head with a reddish-brown triangular spot on 

 the vertex ; clypeus of the same colour, otherwise as in 0. tuollastoni. 



Mandibles. 



1. Forma telodonta. — As in 0. wollastoni (fig. 1 ; comp. fig. 5). 



2. Forma pectinata. — As in 0. wollastoni, but the basal tooth is much more strongly 

 developed, and the small comb-like teeth above the central tooth are longer and 

 stronger (fig. 2 ; comp. fig. 6). 



8. In an amphio-mesodont form the apical teeth are broader than in 0. ludeMngi 

 the mandibles are more strongly curved, the central tooth projects more in front, and 

 there is only one small tooth on the right mandible and one on the left (fig. 3). 



4. Amphiodont and priodont forms unknown. 



Female. Very like that of 0. ludeMngi, but larger, prothorax broader, elytra dark 

 yellow, with a narrow black lanceolate mark in the middle, the rim black beneath, 

 front tibiae straight, with three spines above the terminal fork. Unique in Herr van 

 Lansberge's collection. 



Number of specimens examined : five males and one female, in the collections of 

 Messrs. Parry and van Lansberge. 



Habitat. Borneo (one telodont form said to be from Java'?). 



Measurements. 



Total length. Head. Mandibles. Prothorax. Elytra, 



millim. miUun. millim. miUim. millim. 



Parrj-'s type (telodont ; Borneo) 75 14-0 by 24 26 10 by 23 29 by 23 



Lansberge's coU. (W. Java) 72 14-0 „ 23 26 10 „ 23 28 „ 22-5 



Lansberge's coll. (Borneo; pectinata). . 78 15-0 „ 25 26 10 „ 25 31 „ 24 



Lansberge's coU. (Borneo; peotinata).. 71 12-0 „ 23 23 10 „ 24 29 „ 23 



Lansberge's coll. (mesodont) 65 15-0 „ 22 19 10 „ 22 28 „ 23 



Lansberge's tj-pe, $ 40 7-5 „ 13 9 „ 18 23 ■„ 19-5 



3x2 



