tJoRcus. 87 



angles feebly prcHluccd outwards. Tliero is a miiiuU^ angula- 

 tion of the side of the head behind the eye. The upper 

 surface is not toothed behind the base of the mandible. The 

 pronolnni is short and broad, inieroscopically granular, feebly 

 shining in the middle, the lateral margin of variable form and 

 the hind angle well marked l)ut not very sharp. The scHtellum 

 is finely punctured, with the aiwx smooth. The elytra are 

 very smooth, lightly coriaceous, almost unpunctured, with 

 the shoulders angular but not acute. The lower surface ia 

 smooth but the sides of the metasternmn are densely rugose. 

 The terminal fork of the front tibia is short and strongly bent 

 downward, and the middle and hind tibiae have each a lateral 

 spine. 



Variation of tfie male. Very small specimens (Rhu'tus 

 parryi Boil.) are relatively narrow in shape and have the 

 mandibles simple, narrow and strongly curved, the lateral 

 margins of the pronotum gently rounded and the sides of 

 the elytra rugosely punctured. Rather larger males show a 

 blunt angulation near the base of the mandible internally, 

 which at a further stage becomes a sharp triangular tooth 

 {D. yaksha GrvL). With increasing size and lengthening 

 mandibles the relative width of the body increases and the 

 curvature of the sides of the prothorax is interrupted by an 

 indentation in front, while the roughness of the sides of the 

 elytra gradually disappears. In moderately large s})ecimen8 

 the mandible bears a very stout horizontal tooth, which has 

 advanced towards the middle, the indentation of the thoracic 

 margin forms a prominent angle behind it and the elytra are 

 broad and very smooth. Very large males have the mandibular 

 tooth beyond the middle and directed obliquely forward and 

 the lateral angulation of the prothorax is near the middle 

 of the side margin. The ])rominence of the angles of the 

 clypeal process increases with the size of the sjjecimens. 



^. /v »5r^/t( with mandibles), 2()-70 mm.; (without mandibles) 

 24-50 mm. : breadth, 10-28 mm. 



$. Length, 27-42 mm. ; breadth, 11-17 \\m\. 



United Pro v. : Naini Tal [D. Given) ; Kumaun, W. Almora 

 (//. G. Champion). Darjkeling Distr. : Pedong {L. Durel) ; 

 St. Mary's Forest, Kurseong {R. P. Wery ; E. A. D'Abreu, 

 June). Assam: Cherrapunji. Burma: Ruby Mines {W. 

 Doherty). Siam. 



Type in the Hope Dejjt., Oxford University Museum, also 

 that of L. scarifides ; that of Rhutus parryi Boil, in the Paris 

 Museum and that of D. yaksha Gravely in the Indian Museum, 

 Calcutta. 



