444 DR. F. LEUTHNER ON THE ODONTOLABINI. 
Var. Lucanus cumingi, Hope, Cat. Luc. Col. p. 17. 
Var. Lucanus dux, Westw. Ann. Nat. Hist. vill. p. 124 (1841) ; Cab. Or. Ent. p. 17, pl. vin. fig. 1 
(telodont ; good figure). 
Odontolabis dux, Parry, Trans. Ent. Soc. Lond. (38) i. p. 76. 
Male. Uniform dull black, elytra less shining than in the other species, head large, 
longer than the prothorax, front edge strongly emarginate; the sides straight, or 
oblique in front ; canthus narrow; spine behind the eyes obtuse; the lower parts of 
the cheeks coarsely wrinkled or pitted; prothorax twice as broad as long, its front 
edge strongly emarginate on each side; the sides trispinose (with two deep con- 
cavities); the middle spine never so prominent as in 0. bellicosus; in the smallest 
priodont specimens the front spine is obsolete; prosternal and mesosternal processes 
very prominent; elytra long, oval, slightly shining; front tibize long, with one or two 
spines above the terminal fork. 
Mandibles. 
1. Forma telodonta.—Mandibles as long as the head and prothorax together, 
rounded, convex within, and curved downwards, with only four apical teeth (figs. 1, 2). 
Head with raised crest.—(0. dux, Westw.) 
2. Forma mesodonta.—Mandibles shorter, rounded, with four apical teeth, and a 
strong tooth beyond the middle, projecting downwards:—a. With no basal teeth 
(fig. 2) (O. alces, Fabr., type); 6. One or two basal teeth (fig. 4). 
3. Forma amphiodonta.—Mandibles rather longer than the head, broad, flattened, 
with four or five apical and three obtuse basal teeth of equal size separated from the 
former by a semicircular gap (fig. 5).—(O. cumingi, Hope.) 
4. Forma priodonta.—Mandibles as long as the head, flattened, similar to those of 
O. bellicosus, with eight or nine crowded teeth, without gaps, on the inside of the 
mandibles (figs. 6, 7, the latter with prothorax like the female). 
Female. Uniform deep black; mandibles, head, and sides of prothorax obsoletely 
shagreened. LElytra dull, extremely finely punctured; head broad; upper side mode- 
rately convex; canthus broad; mentum wrinkled, slightly expanded on each side ; 
mandibles with three or four irregular teeth on the inside; prothorax very convex, 
strongly emarginate in front, the front angle generally obtuse, the sides slightly 
S-shaped as far as the middle spine, and then emarginate; hind margin waved; 
prosternal process variable, generally round, but often flattened; front tibize with 
four or five obtuse spines above the slightly developed terminal fork; elytra convex 
long, oval; the shoulders acute, or somewhat obtuse. 
Habitat. Luzon (Manilla). 
Number of specimens examined ; 320. 223 specimens (112 males and 111 females) 
in a single consignment. 
