72 LUCANID^. 



slender, flat, u;ently curved, with uumcrous line teeth at the 

 inner edge in the front half. The front angles of the pronotuni 

 are little produeed and the hind angles very obtuse. In 

 well-developed males the head is nnuh broader than tlie 

 prothorax and elytra, a little hollowed in the middle, strongly 

 contracted and only a little swollen behind the eyes, the outer 

 angles of the clypeal ])rocess are sharply produced, the mandi bles 

 are very stout, not flat, rather straight excejft at tlie base 

 and apex and deflected })eyond the base, with a strong inteinal 

 tooth placed considerably past the middle, a very minute one 

 a little behind it, a small one just behind the tip and fine 

 irregular tubercles between this and the strong tooth. The 

 sides of the j)ronotum are perpendicular and the hind angles 

 are broadlj^ rounded and obsolete. 



^. Length (with mandibles), 48-77 mm. ; (without mandibles) 

 85-52 mm. : breadth, 15-19 mm. 



$. Length, 35 mm. ; breadth, 14 mm. 



Assam : Sylhet ; Sibsagar {E. T. Atkinson). Burma : 

 Kauri, Kachin Hills {L. Fea, August, November). 



Type in M. Rene Oberthiir's collection. 



The two sexes were taken together by Fea and examples 

 have been kindly lent to me for description by the Genoa 

 Museum. The British Museum contains only large males. 



23. Hexarthrius bowringi. (Plate VI, fig. 6.) 



Hexarthrms hoicnngi Parry, Proc. Ent. Soc. Lond. 1862, p. lOS; 

 Trans. Ent. Soc. Lond. 1864, p. 12, pi. 9, figs. 5 & 7. 



^. Deep chocolate-red, with the head and pronotmn, the 

 antennae and tarsi almost black. Narrow in shape, the 

 surface dull but with very glossy elytra. The head is uniformly 

 and densely granular, not very broad in front, the front angles 

 mod(!rately sharj), the sides gently rounded but not strongly 

 convergent behind the eyes. The clypeal j^rocess is narrowly 

 triangular and bluntly pointed. The middle of the head is 

 slightly depressed . The mandi bles liave a downward curvature 

 and are gently rounded externally. There is a short, rather 

 broad, truncate tooth internally at a short distance from the 

 base, a strong sharj) tooth near the tip and a small one at a 

 little distance behind it. The club of the antenna consists 

 of live short lamella' and the preceding joint is pointed but 

 not produced. The pronoturn is also densely granular and 

 oj)aque, but less so in the middle than at tlie sides. It is 

 rather narrow in front, the front angles are t)luntly j)roduced, 

 the sides almost straight to the rounded lateral angles and 

 almost straight from there to the strongly marked but not 

 acute hind angles. The elytra are without distinct ])unctura- 

 tion, the shoulders acute and the apices a little produced. 



