148 LUCANID^. 



CladogiuUhus marginatus Burm.,* Handb. Ent. v, 1847, p. 369; 



Arrow, Trans. R. Ent. Soc. Lond. Ixxxiii, 1935, p. 107. 

 Var. Metopodontus roepstorffi Wat.,* Ann. Mag. Nat. Hist. (6) v, 



1890, p. 35. 



Bright yellow, opaque above in the male, mainly shining in 

 the female, the mandibles and tibiae more or less reddish, the 

 antennae, tarsi, three spots placed transversely upon the 

 pronotum and the extreme edges of the prothorax and elytra 

 l)laek, the thoracic spots placed one in the middle and one 

 near the lateral margin on each side. Compact and moderatelj^ 

 broad. The lamellae of the antennal club short and tlie seventh 

 joint produced into a spine-like process. The prostei-num 

 produced and pointed behind. 



$. The upper surface is shining, strongly j^unctured and more 

 convex than tliat of the male, the mandibles, the sides of the 

 head and the scutellum are black or very dark red and there is 

 a well-marked black sutural stripe upon the elji^ra. The head 

 is coarsely and in front rugosely punctured. The pronotum is 

 strongly and closely punctured, with a narrow smooth median 

 stripe, and the lateral margins are rugose. The elytra are 

 densely punctured. The lower surface is strongly punctvu-ed, 

 excejjt the middle of the metasternum, where the punctures are 

 fine. The front tibia is broad at the end, where it has four 

 short lobes. 



cJ. The upper surface is opaque, but the middle of the head 

 and pronotum less so than the sides, and tlie scutellum and 

 elytral suture are rather shinmg. The front angles of the head 

 are rounded or very obtuse, the eyes are small and not at all 

 ])rominent and there is a pointed lateral process behind each 

 eye. The pronotum. is short and broad, the front angle is 

 produced but blunt, the sides are rounded to far behind the 

 middle, where there is a distinct but not acute angle, and 

 straight to the base, the hind angle very obtuse. The elytra are 

 finely and closely punctured but more sparsely in the anterior 

 part. The shoulders are acute-angled and the apices a little 

 })roduced and flattened. The lower surface is opaque, except 

 in the middle of the sterna. The front tibia is very finely 

 serrate at the outer edge, with four or five very small sliarp 

 teeth, and dilated internally at tlie; end, where it bears a 

 strongly hooked terminal sp\ir. The middle and hind tibiae 

 are without lateial spines. 



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

 above and the mandibles an^ broad and flat, with their iimer 

 edges contiguous and irregularly serrate. In larger specimens 

 an oblique dark-])igmented carina appears on each side, the 

 two carinas converging behind. The mandibles are longer, 

 less flat and more widcOy sc^j)arated and liave two sti'ong 

 alternating teetli near the base and ;i 1)ifid tip. Al a. more 



