DR. F, LEUTHNER ON THE ODONTOLABINI, ATT 
I had had only this specimen to guide me, I should have supposed that 0. intermedius, 
Deyr., O. carinatus, Linn., and the middle-sized specimen of O. cingalensis, Parry, were 
all distinct. But this species varies to such an extent that it is difficult to find two 
males which are exactly alike. 
I have done my best to do justice to my predecessors; but it is difficult even to 
divide this species into two, as attempted in Pl. XCVIL., for we find large and hairy as 
well as hairless specimens; the front tibize are sometimes straight, sometimes curved, 
and the mandibles of the mesodont form vary to any extent. The striking difference 
in the prothorax of the male (figs. 7-9), which appears much broader in the middle, 
arises only from the front margin of the prothorax being narrower. The question of 
specific distinction can only be decided if the Cingalese race shows constant differences 
when compared with Indian specimens; but we have not a sufficiently large series of 
the latter for this purpose. In the meantime it may be best, simply as a matter of 
convenience, to separate two races, both of which are found in Ceylon :— 
(a) O. carinatus, Linn. (figs. 7-9,4; fig. 10,?).—Mandibles strongly curved, deeply 
channelled on the upper surface; prothorax broadest in the middle, and rather nar- 
rower in front. Head, prothorax, and elytra shining in the middle, and hairless. 
(b) O. cingalensis, Parry (figs. 11-13, 3; fig. 14,2 ).—Much larger than form a, man- 
dibles generally longer and more slender, prothorax as broad in front as in the middle, 
elytra dull, or clothed with fine brown hair (Calcutta, Madras, Ceylon), 
Species incerte sedis. 
30. ODoNTOLABIS sTRIATUS, Deyr. (Plate XCVII. figs. 1, 2,6; fig. 3,2.) 
3 3. Odontolabis striatus, Deyr. Ann. Soc. Ent. France (4) iv. p. 313 (1864), pl. iv. fig. 3, ¢ 
(admirable figure) ; Westw. Trans. Ent. Soc. Lond. 1874, p. 360 (¢ var.), pl. iii. fig. 4. 
Male. Entirely clothed with fine brown hair, as in 0. dalmani. Head flattened, 
canthus narrow, straight; spine behind the eyes sloping obliquely backwards and 
downwards; prothorax broader than the elytra, front edge strongly emarginate on 
each side, the sides moderately curved as far as the central spine, and then deeply 
emarginate; hind margin waved; elytra flattened, the shoulders angulated, clothed with 
brown hair, and with four smooth longitudinal stripes on each side, which unite before 
the tip; front tibiz rather broad, with five or six spines above the terminal fork; man- 
dibles as long as the head and prothorax together, flattened, not much curved at the 
tip, and bifurcate; base broader, with two teeth on the inner side. 
Female. Size and appearance of O. carinatus, and entirely clothed with brown hair, 
as in the male. Head flattened, canthus broad, emarginate in front, and then pointed ; 
mentum with a crescent-shaped crest; prothorax with the front edge deeply emar- 
ginate on each side; front angles acute, the sides slightly convex, and deeply emargi- 
nate behind, hind margin strongly waved ; elytra pubescent, with four parallel smooth 
