CORYNO.UES. 505 



More nearly allied to C. dohrni, Baly, than to any other 

 species, but more narrowed posteriorly, the head different in 

 structure, the thorax shorter, and the general colour very dark 

 violaceous. 



878. Corynodes tridentatus, sp. n. 



2 . Metallic dark blue. Head with deep central groove on the 

 vertex, remotely but distinctly punctured, apex of anterior portion 

 produced into three acute teeth ; clypeus separated from the face by 

 a deep transverse sulcus. broader than long, very closely and finely 

 punctured ; labrum black ; antenna entirely black, not extending 

 to the middle of the elytra, terminal five joints strongly widened, 

 broader than long. Thorax conical, gradually narrowed towards 

 apex, lateral margins straight ; surface finely and irregularly 

 punctured, very sparingly so and strigose at the sides, more 

 closely in the middle, but leaving a small central space nearly 

 smooth. Scutellum rather longer than broad. Elytra parallel- 

 sided, rather deeply transversely depressed below the base, very 

 closely and somewhat regularly punctured, punctures not larger 

 than those on the thorax, extreme lateral margins purplish. Breast 

 impunctate ; abdomen finely punctm-ed. Claws appendiculate. 



Length 10 mm. 



Hob. India. Type in Brit. Mus. 



Can be distinguished by the black antennae and tridentate 

 margin to the face. 



879. Corynodes dohrni, Baly,Dcscript.)mc gen. 8,-spec. Phytoph. 1864, 

 p. 4 ; Marshall, Journ. Linn. Soc., Zool. viii, 1865, p. 39. 



Violaceous-blue; basal joints of antennae (first excepted) 

 fulvous. 



<$ . Vertex strongly convex, puncturation variable, generally 

 subremote, a more or less strongly marked central groove ; 

 clypeus extremely closely and finely punctured, strongly separated 

 from the face, the base marked with a tubercle ; antenn with 

 the basal joint blue, following five joints light fulvous, rest 

 purplish-black, broadly dilated. Thorax slightly narrowed in 

 front, conical when looked at from above, lateral margins nearly 

 straight, punctures deep and remotely placed. Elytra with pro- 

 minent shoulders, a short and deep depression below the base, 

 not extending to the sides ; surface punctured like the thorax, 

 punctures placed in irregular rows, lateral margins preceded by a 

 strong costa. Claws appendiculate. 



Var. (?). Metallic green ; sides of elytra purplish, apex pubes- 

 cent ; body beneath and legs aureous or cupreous. 



Lenyth 8-10 mm. 



Hob. Ceylon. 



Differs from G. pereyrimis in the much more finely punctured 



