DOKCUS. Ill 



The luandibles arc slioitcr tluui the head, simijlc, fahtifnnn, 

 far apart at the base and very acute at the tip. There is a 

 slijilit indication of a tooth at the base. The clyi)eal process 

 is very sliort, broad, with the froiit edije straij^ht and frin<fcd. 

 In larger specimens the liead is a Httle broa(U'r and more 

 finely i)unctured and the mandibles show a strong horizontal 

 tootii at the base. At a farther advance the head becomes 

 dull and little punctured, the ])uncturation of the pronf)tum 

 diminishes, the sides arc less rounded, the. lateral angle more 

 distinct, and a slight indentation a[)]>ears near the front angle. 

 The grooves of the elytra are sliallowcr and the intervals 

 wider. In moderate-sized males tlie head and thorax aie dull 

 and unpuiuturcd, the head is longer behind the eyes, whicli 

 are less prominent, the elytra arc smooth dorsally, with traces 

 of lateral striu', the sides strongly and closely punctured. 

 The mandibles are longer, the tooth a little removed from the 

 base and shorter and broader in shape. With still lengthening 

 mandibles, the tooth continues to advance to the middle and 

 to become shorter, while a second tooth ajipears in front 

 of the first and another minute one behind the tij) of the 

 mandible. The angles of the cly})eal process are a little 

 j)roduced and its front margin becomes curved. In large 

 males the mandibular process is in front of the middle, short 

 and 2-cus))ed, the head and thorax are very broad, the inden- 

 tation of the lateral margin of the latter is farther from the 

 front angle and leaves a rather sharp tooth behind, near the 

 middle, the lateral angle is also sharp, the elytra are glossy, 

 without trace of striation, the sides closely and regulai'ly 

 l)unctui'ed. In the largest examples the mandibles arc slender 

 but flattened, rather straight, twice as long as the head, the 

 2-cus|)ed ])rocess is situated much before the middle and 

 directed obli(juely forward. 



J. Lf'nglh (with mandil)les). 20-.'i<) mm.: (without mandil)lcs) 

 18-43 mm. : hnadth, S-2() nun. 



$. Length, Ii)-2<> mm. : breadth, 8-13 mm. 



Darjeelixu Distr. : Kurseong (E. A. D'Ahreu) ; Mang|)u 

 {E. T. Atkinson) ; Gopaldhara, Hungbong Valley (H . Stevens) ; 

 TVdong {L. Durel). Assam. Bitrma : Iluby Mines ( U'. 

 Dohcrtij). W. China. Siam. Malay Peninsula. Si-matra. 

 Borneo. 



Tt/pes of reichei, cognatus and glahripennis in the British 

 Museum, those of castelnandi and pnrcellens in the Obcrthiir 

 collection, that of cerriilus in the (Tcnoa Museum. 



Specimens from the Ea.stern j)art of the range of this species 

 con.stitute a j)hase which has been .separated by various 

 authors and given the names castelnandi, cervnlns and hanstelni. 

 In the males not of very small size the surface of the elytra, 

 as well as that of the head and pronotum, is dull and sooty, 



