LUCANUS. 45 



Variation of the male. In small specimens the head is rather 

 narrow and the median process is conical and pointed. The 

 mandibles arc arched, the tips gently incurved and the 

 tubercles crowded and irregular. In larger specimens the 

 head is broader, the median process broad and truncated, the 

 mandibles are greatly lengthened with the middle part 

 approximately straight, the tubercles may be more scattered 

 and the tip is forked. In the largest examples the tooth 

 beneath the front tibia is conspicuously long. 



J. Length (with mandibles), 42-80 mm.; (without mandibles) 

 32-50 mm. : breadth, 13-20 mm. 



$. Length, 30-38 mm. ; Jjrcadth, 12-5-15 mm. 



Assam: Naga Hills {W. Doherty) ; Manipur (IF. Doherty). 

 Burma : Ruby Mines [W. Doherty). 



Type in the British Museum. 



2. Lucanus lunifer. (Plate III, fig. 3 ; Plate V, fig. 1.) 



Lucanus lunifer Hope, Royle'.s Illustr. Nat. Hist. Himalaya.s, i, 1S,39, 

 p. 55, pi. 9, fig. 4; Planet, Essai Monogr. ii, 1899, p. [2, 

 figs. 5 & 6. 



Black or nearly black, the elytra reddish-brown in the 

 male, in which sex there is usually a very faint metallic 

 suffusion of ])arts of the upper surface. The body clothed 

 with fine yellowish hair, which is rather long and close upon 

 the metasternum. Each elytron has a longitudinal elevation 

 in its posterior lateral part, sometimes absent in the female. 

 The club of the antenna consists of four long lamellae of equal 

 length. 



$. The colour is darker than that of the male and the legs 

 are entirely black. The shape broadly oval and convex. The 

 head is coarsely rugose, the ej'e-ridge angulate in front and 

 behind. The pronotum is rugosely punctured at the sides, 

 finely and closely in the middle. The front angles are rather 

 sharp, the sides rounded to the blunt lateral angle and feebly 

 concave to the distinct but obtuse hind angle. The elytra 

 finely and closely punctured, but shining, except at the apices, 

 which are densely piuictured. 



3*. Colour very dark brown, the tibiae and the abdomen in 

 part deep red. The head is densely coriaceous and oi)aque, its 

 margins outlined by a strong ridge nearly straight in front and 

 interrupted in the middle behind. The clypeal process is very 

 long and strongly forked at the end, the epistome acutely 

 pointed. The front angles of the head are sharply produced 

 outwards. The pronotum is finely rugose and opaque, except 

 in the middle, where it is rather indistinctly punctured and has 

 a faint median groove. The front angles are strongly 

 produced but not sharp, the side nearly straight to the very 

 strong but blunt lateral angle and again nearly straight to the 



