470 DR. 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 surface 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 tibize 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. millim. 
¢. Lansberge’s coll. (telodont) ........ 52 11°5 by 17-0 14 9:0 by 20 21 by 18 
do. Parry’s coll. (telodont) .......... 2 9°5 ,, 13 125 8:0 ,, 16 18 ,, 15 
do. Parry’s coll. (amphiodont) ........ 50 OO lace 12 9:0 ,, 20°5 22 ,, 19 
Lansberge’s coll. (priodont) .......... 53 9:0 Feali7 12 10°0 ,, 21°5 23 ,, 20 
Lansberge’s coll. (priodont, smallest ¢).. 27 5:08 eed 5 55 ,, 11 ie Peel 
PP an basco do Go Oh Ce DOM ODOM Tes eg NG 28 50, 85 a 70 ,, 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 Vollenhoven, 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 LOW, Parry. (Plate XCV. fig. 9.) 
3+ Odontolabis lowei, Parry, Trans. Ent. Soc. Lond. 1878, p. 386, pl. v. fig. 1. 
Male (forma amphiodonta). Much larger than the corresponding form of 0. brooke- 
