SUMATRAN LUCANIDAE 623 



with gulden red hairs; the underside of the femora and of 

 the tibiae, and the intercoxal part of the pro- and meso- 

 sternum densely covered with a fine golden red pubescence; 

 the rest of the undersurface sprinkled with pale coloured scale- 

 like hairs. On the scutellum and along the extreme base of the 

 elytra a few similar scale-like hairs are present. 



The mandibles are slender and elongate and slightly curved ; 

 at some distance from the base they are curved upwards, then 

 they are gradually sloping so that the tips lie about in the same 

 level as the base. They are enlarged at the base on the inside, 

 and provided on the undersurface , at some distance from the 

 base (at the end of a flattened portion) , with a stout tooth 

 which is obliquely directed downward, forward and inward; 

 the outer margin of this tooth is angular about the middle of 

 its length , the inner margin is regularly curved and provided 

 at its base in the left mandible with one stout tubercle, in the 

 right mandible with three very small tubercles or undulations. 

 At about three fourth of their length the mandibles bear another 

 stout tooth which arises from their upper surface and which is 

 obliquely directed upward, forward and inward. The sub-apical 

 tooth is small, and between it and the apex five or six smaller 

 teeth are present ; the inner edge of the mandibles is keel-shaped. 

 The basal enlargement and the tip of the mandibles are smooth, 

 the former with a few large punctures ; the rest of the man- 

 dibles is extremely densely and finely granulated. 



The head is very broad anteriorly and shows above a large 

 semilunar flattened and well defined depression, which does not 

 quite extend to the front margin of the thorax. In front of this 

 depression, the anterior margin of which is curved backwards, 

 the head sinks perpendicularly to the clypeus which is declivous 

 and has an obsoletely tridentate front margin. The head is very 

 densely and finely granulated, coarser however at the sides 

 where very fine oblique wrinkles may be observed. 



The sides of the prothorax are angular in the middle and 

 here provided with a distinct tooth formed by the flattened 

 margin of the basal half. The middle portion of the disk is 



