DR. F. LEUTHNER ON THE ODONTOLABINI. 475 
moderately convex, very finely punctured, smooth and shining, or frequently clothed 
with fine brown hair; front tibie long, straight, or slightly incurved, forked at the tip 
both on the outside and inside, finely punctured, the tip clothed with brown hair; 
inside of the four hind legs thickly clothed with silken hair. 
Mandibles. 
1. Forma telodonta.—Mandibles as long as the head and prothorax together, mode- 
rately curved, flattened, resembling O. castelnaudi, the tip forked, or with three small 
teeth, followed by a small branch projecting inwards, which is often forked ; base 
without teeth (nineteen examples). 0. cingalensis, Parry. 
2. Forma mesodonta.—Mandibles as long as the head, strongly curved, upper side 
channelled; four or five apical teeth, followed by the middle tooth, which projects 
strongly downwards; an obtuse basal tooth; head in front narrower, canthus slightly 
emarginate, spine behind the eyes slightly prominent; prothorax apparently broader, 
owing to the narrower head ; front tibie straight, or slightly curved (eight specimens). 
O. nigritus, Deyr. 
3. Forma amphiodonta.—Mandibles as long as the head, strongly curved, with three 
or four apical teeth, an obtuse basal tooth; prothorax broader than the head or elytra. 
O. carinatus (type). 
4. Forma priodonta (irregularis).—Mandibles shorter than the head, the right side 
more strongly developed than the left, with from five to seven irregular teeth; a small 
triangular epistoma above the mandibles, 
Female. Black, upper side dull, underside shining. Head broad, flattened, dull, 
the front strongly punctured, canthus straight, narrow, mandibles coarsely granulated ; 
prothorax long, broadest in the middle, front edge strongly emarginate on each side 
and clothed with reddish-brown hair, the sides nearly straight in front, strongly emar- 
ginate behind, hind margin nearly straight, with brown hair; elytra flattened, with only 
the middle shining; front tibie with two spines above the terminal fork, hind tibie 
but slightly curved. 
Number of specimens examined: eighty males and twenty-three females. 
Habitat. Ceylon. The British Museum also possesses specimens from Madras and 
Calcutta. 
Measurements. 
Total length. § Head. Mandibles. Prothorax. Elytra. 
millim. millim. millim. millim. millim. 
3. British Museum (telodont) .... 66 11-0 by 17 22:5 11 by 19 24 by 20 
do. British Museum (mesodont).... 42 8:0 ,, 14 10 
¢. British Museum (amphiodont).. 48 10-0 ,, 16 11 LOFeL9) 22 ,, 18 
¢. British Museum (priodont) .... 39 8:08 Ll 7 ye, lists IG) ss 
@. British Museum ............ 32 60,, 8 5 8 ,, 14 18 ,, 15 
@. British Museum ............ 22:5 35 ,, 6 3 6 ,, 10 12 ,, 10-5 
