DE. F. LEUTHNEE ON THE ODONTOLABINI. 463 



from spine to spine, which entirely alters the appearance of the insect. The yellow 

 mark on the head is by no means so sharply defined as in the figure, which represents 

 it as raised. The prothorax is equally mcorrect, being represented as much too broad 

 at the base. It is unfortunate, too, that VoUenhoven had an abnormal male of the 

 telodont form before him, in which the prothorax was strongly narrowed in front, a 

 character which is neither constant nor typical (fig. 2). In normal specimens the 

 prothorax resembles that of 0. ludekingi and 0. wollastoni. 



This specimen long remained unique ; but a short time ago the Leyden Museum 

 received seven males and three females. Herr Ritsema, who described the males and 

 the previously unknown female, was kind enough to show me his MS. All the speci- 

 mens figured on PI. XCIV. are from the Leyden Museum. The various forms figured 

 are exceedingly interesting and instructive, for they show us what considerable variations 

 may occur in other parts of the body besides the mandibles. (Compare the head and 

 thorax in figs. 1 & 2.) The front tibise in figs. 1 & 2 are rounded, while figs. 3 & 4 

 show a slight inward curvature, and a shallow channel on the upper surface '. The 

 priodont male (fig. 5) is like the female both in the form of the thorax and in the 

 reddish-yellow spots on the front angles, which are so characteristic in the large 

 females. The female represented in fig. 7 is equally interesting. The prothorax is 

 black, and the elytra are marked as in the male. 



20. Odontolabis gazella, Fabr. (Plate XCVI. figs. 10, 10 5, c? ; fig. 11, 2 : compare 

 Plate XCI. fig. 6, $ , Fabrician type !) 



? . Lucanus gazella, Fabr. Mant. Ins. i. p. 1 (type in Mus. Banks, B. M.) ; Ent. Syst. i. p. 238; 



Syst. Eleut. ii. p. 250; Oliv. Ent. i. 1, p. 13, pi. iv. fig. 13a, b (recognizable figure); Herbst, 



Col. iii. p. 313; Thunb. Mem. Soc. Nat. Mosc. i. p. 162; Schonh. Syn. Ins. i. 3, p. 324. 

 (J . Lucanus bicolor, Oliv. Ent. i. 1, p. 22, pi. v. fig. 20 (recognizable figure) ; Thunb. Mem. Nat. 



Mosc. i. p. 204; Westw. Cab. Or. Ent. p. 53, pi. xxvi. fig. 1 (excellent figure). 

 Anoplocnemns bicolor, p., Burm. Handb. Ent. v. p. 360. 

 Odontolabis bicolor, Thorns. Ann. Soc. Ent. France (4) ii. p. 395; Parry, Trans. Ent. Soc. Lond. 



(3) ii. p. 77; Cat. Lucan. Col. ed. 3, p. 14. 



31ale. Uniform black, with the upper side of the elytra yellowish brown ; mandibles 

 sickle-shaped, with strong wrinkled punctuation ; head flattened, finely punctured ; 

 frontal edge but slightly emarginate ; canthus very broad, spine behind the eyes 

 straight, directed slightly backwards, and obliquely truncated behind ; prothorax very 

 short and broad, only slightly convex, widened on the sides towards the middle spine, 

 and then strongly emarginate ; underside smooth ; prostemal process well developed, 

 oblique, directed backwards. Elytra long, oval, strongly convex, yellowish brown, with 



' This apparently unimportant modification of form throws a light on those retrograde male forms with 

 short mandibles, large heads strongly narrowed behind, a broad prothorax, and curved front tibise. (Compare 

 0. gazella, Fabr., and the other species figured together on PI. XCVI.) 



