CHALCOSOMA. 



267 



tridentate head or club. The thoracic horns arise nearer together 

 and are generally more parallel, disappearing entirely in the most 

 dwarfed specimens. 



Fig. W.— CJialcosoma atlas, female, natural size, 

 and profiles of males of medium (a) and minor (b) development. 



5 . The form is more ovate and less convex, and the upper 

 surface is not at all shining. The head and pronotum are densely 

 granulated and entirely devoid of armature, the latter very convex, 

 Avith the sides regularly curved and narrowed to the front angles. 

 The scutellum is shining and slightly punctured, and the elytra are 

 dull, coriaceous, clothed with minute, reddish, erect setae, which 

 are distributed in small tufts at the middle of the back and 

 unifoi-mly elsewhere, and the pj/gidium and the sides of the meta- 

 sternum and abdomen are clothed with similar uniformly distributed 

 setae. The legs are shorter and of normal form. 



Length 45-73 mm. ; breadth 24-44 mm. 



Nepal ; Burma : Martabau, Aracan ; Malay Peninsula ; 

 BoBNEO ; Java ; Philippine Is. 



