466 DR. F. LEUTHNER ON THE ODONTOLABINI. 
Section V. 
22. ODONTOLABIS CASTELNAUDI, Parry. (Plate XCV. figs. 1-4, ¢; fig. 5, ? .) 
3. Odontolabis castelnaudi, Parry, Trans. Ent. Soc. Lond. (3) ii. p. 14, pl. i. fig. 2; 1. ce. (1870) 
p. 74, pl. iii. figs. 4, 5, 6. 
Male. Uniform black, the elytra excepted. Head flattened, finely punctured, front 
margin slightly arched; canthus very narrow, spine behind the eyes very prominent, 
rounded, obtuse, sloping obliquely towards the neck. Prothorax with the front edge 
emarginate on each side, the sides straight, rounded off beyond the middle, in the 
position of the central spine, and then somewhat emarginate. Under-surface smooth, 
dull. Prosternal process projecting strongly forwards. Elytra uniform orange-yellow, 
except a narrow black border at the base, and a line on the suture ; the outer margin is 
also very narrowly edged with black. Front tibiz long, slender, and slightly incurved, 
the terminal fork well developed, and one or two very small spines above it. A shallow 
channel runs along the whole of the upper side. 
Mandibles. 
1. Forma telodonta.—Mandibles as long as the head and prothorax together, slender, 
the tip simple, below which is a strong projection slightly bifurcate at the tip, below 
which are four or five small irregular teeth on the inside. A small tooth projects 
forward on the inside near the base. Head with the front margin somewhat swollen ; 
a broad epistoma is present, which is straight in front, and clothed with red hair 
(fig. 1). 
2. Forma mesodonta.— a, var. pectinata. Mandibles as long as the head, much thicker 
than in no. 1, with four or five very small irregular teeth at the tip, followed on the 
inside by four small obtuse teeth, and a strongly developed central tooth curving down- 
wards ; base with an obtuse tooth (fig. 2). 0, var. mesodonta (s. str.). Mandibles as long 
as the head, strongly curved, with five small apical teeth, and a rounded tooth curving 
downwards in the middle; base with an obtuse tooth; head with the front margin 
emarginate (fig. 3). 
3. Forma amphiodonta.—Mandibles much shorter than the head, strongly curved, 
flattened, with five apical teeth, separated by a gap from the two obtuse basal teeth. 
Head without frontal crest or epistoma (fig. 4). 
4. Forma priodonta.— Unknown. 
Female. Black, except the yellow elytra. Head long, slightly convex, strongly and 
coarsely punctured ; canthus round, as broad as the eye; mentum strongly shagreened, 
and semicircularly excavated ; mandibles comparatively small. Prothorax much arched, 
the sides convex, with no central spine, and but slightly emarginate behind. Elytra 
long, oval, orange-yellow, narrowly black at the base, and with a narrow black stripe 
on the suture; rim of the elytra black beneath (fig. 5). 
