DE. F. LEUTKNEE ON THE ODONTOLABIKI. 481 



small teeth at the tip, and a strong projecting middle tooth on the upper side of the 

 mandibles (fig. 10). 



3. Forma amjjhiodonta. — Mandibles as long as the head, with four small teeth at the 

 tip and two at the base on the upper side of the mandibles (fig. 11). 



Female. Larger than E. brachypterus, much broader ; head broad, but very short, 

 dull, the sides with large scattered punctures ; canthus broader than the eye ; mandibles 

 longer than the head, somewhat curved outwards, coarsely shagreened, with five or six 

 teeth at the tip, then with a crescent-shaped emargination (above which is a small 

 obtuse tooth on the upper side), and two small obtuse teeth near the base ; prothorax 

 much broader than the head, shaped as in H. hrachypterus ; elytra shining ; front tibi© 

 with three or four spines above the terminal fork. 



Habitat. Andaman Islands. 



Thirty-four specimens examined ; twenty males and fourteen females. In the collec- 

 tions of Major Parry and of Messrs. Newcombe and Meldola. 



Measurements. 



Total length. Head. Mandibles. Prothorax. Elytra, 



millim. millim. millim. millim. millim. 



<J . (telodont) 46 8-5 by 16 15 8-5 by 18 18 by 17 



c?. (mesodont) 40 8-0 „ 16 8'5 9-0 „ 18 18 „ 17 



c^. (amphiodont) 28 4-0 „ 8-5 5-5 5-5 „ 11-5 14 „ 12-5 



$ 29 4-5 „ 9 5-5 6-0 „ 13 15 „ 12-5 



The telodont form of the male only has been previously described ; but the kindness 

 of Messrs. Meldola and Newcombe has enabled me to describe the other forms of the 

 male as well as the female. I have already shown (p. 404, no. 9), that the female form 

 of the mandibles is connected with the extreme male form by an unbroken series of 

 transitional forms. 



PART III. 



Geogeaphical Distribution of the Odontolabini. 



The Lucanidse (exclusive of the Passalidae) form a very natural family of beetles, 

 which is represented iu aU parts of the world, except the Polar Eegions. Each of 

 Sclater's main Zoo-Geographical Regions possesses its characteristic forms ; but in spite 

 of their great morphological differences, their close relationship and common origin 

 cannot be questioned. 



The first attempt to investigate the geographical distribution of the Lucanidse was 

 made by Burmeister', and was carried further by Wallace- on the basis of Parry's 

 ' Catalogue.' The latter author subsequently called attention to the occurrence of 



' Burmeister, Handbuch der Entomologie, Band v. p. 316. 



- Wallace, Geographical Distribution of Animals, vol. ii. pp. 492, 493. 



VOL. XI. — PART XI. No. 13. — November, 1885. 4 a 



