470 DK. F. LEUTHNER ON THE ODONTOLABINI. 



2. Forma amphiodonta. — Mandibles as long as the head, flattened, semicircularly 

 curved, with five equal-sized apical teeth, and two separated from the others by a gap 

 at the base; epistoma wanting. Four specimens (fig. 14). 



3. Forma priodonta. — Mandibles as long as the head, upper surface flattened, 

 broadly sickle-shaped, with from seven to nine contiguous and crowded teeth on the 

 inner side ; under-surface convex, strongly punctured. About twenty-five specimens 

 (fig. 15). 



N.B. In one specimen collected by Mr. A. R. Wallace the blacK basal band at the 

 base of the elytra is continued to the tip as in the female. 



Female. Uniform brown ; head broad, dark blackish brown ; canthus broad ; pro- 

 thorax with all the angles acute, frontal margin nearly straight, sides slightly curved 

 outwards, and then strongly emarginate ; hind margin waved ; upper sui-face mode- 

 rately convex, pale brown, with a broad quadrangular black mark, which is irregularly 

 curved behind ; elytra long-oval, pale chestnut-brown, with a triangular black mark, 

 which varies in size (figs. 16-18). Legs black, front tibiae long, much widened in front, 

 with three spines on the outer side above the terminal fork. (Fourteen specimens.) 



A long series in all the principal collections. 



Habitat. Borneo (Sarawak). 



Measurements. 



Total length. Head. Mandibles. Prothorax. Elytra, 



millim. millim. millim. millim. miUim. 



cJ . Lansberge's coll. (telodont) 52 11-5 by 17-0 14 9-0 by 20 21 by 18 



cJ . Parry's coU. (telodont) 42 9-5 „ 13 12-5 8-0 „ 16 18 „ 15 



c? . Parry's coll. (amphiodont) 50 10-0 „ 17-5 12 9-0 „ 20-5 22 „ 19 



Lansberge's coll. (priodont) 53 9-0 „ 17 12 10-0 „ 21-5 23 „ 20 



Lansberge's coU. (priodont, smallest cJ ). . 27 5-0 „ 7 5 5-5 „ 11 14 „ 11 



2 28 5-0 „ 8-5 4 7-0 „ 12-5 16 „ 13-5 



A long series of this remarkable species was brought to England by Mr. A. R. 

 Wallace. It exhibits three distinct male forms, two of which have been already 

 described by Parry and VoUenhoven, and the third (priodont) is here added. The 

 colour of the elytra and the pattern on the upper surface of the prothorax vary consi- 

 derably in both sexes. Male priodont examples occur, though very rarely, with elytra 

 coloured as in the female, and, on the other hand, females occur with male colouring 

 (fig. 18). The transitional forms between figs. 16 & 18 sufficiently indicate that the 

 whole series belongs to one species. 



25. Odontolabis lowii, Parry. (Plate XCV. fig. 9.) 

 (J. Odontolabis lowei, Parry, Trans. Ent. Soc. Lond. 1873, p. 336, pi. v. fig. 1. 

 Male [forma amphiodonta). Much larger than the corresponding form of 0. brooke- 



