DR. F. LEUTHNER ON THE ODONTOLABINI. 481 
small teeth at the tip, and a strong projecting middle tooth on the upper side of the 
mandibles (fig. 10). 
3. Forma amphiodonta.—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 H. 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. brachypterus; elytra shining; front tibie 
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. 
d. (telodont)........ 46 8:5 by 16 15 8°5 by 18 18 by 17 
do. (mesodont) ...... 40 8:0 ,, 16 85 9:0 ,, 18 IE) 5, Uy; 
g. (amphiodont) .... 28 4:0 ,, 85 55 55 ,, 115 14 ,, 125 
SMa Bagh UF vais te. 29 454, 9 5:5 60 ,, 13 15 ,, 125 
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. 
GEOGRAPHICAL DISTRIBUTION OF THE ODONTOLABINI. 
The Lucanide (exclusive of the Passalide) form a very natural family of beetles, 
which is represented in all parts of the world, except the Polar Regions. 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 Lucanide 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. 4a 
