DISSOSTEUSUS. 7 



very sparsely punctulate except near the margins ; with a broad 

 but very shallow depression in the middle. Elytra glossy, each with 

 two or three feebly raised costae. Prosternal process long, not much 

 wider at the base than in the middle, directed down wards and strongly 

 forwards. Hind breast very densely covered with tawny pubes- 

 cence. Last ventral segment sinuate at the apex. Front tarsi 

 moderately dilated, with the first joint nearly twice as long as 

 broad and distinctly longer than the second joint. Third joint of 

 the middle and hind tarsi with a rather long spine at the end of 

 each lobe. 



$ . Broader than the male ; the antennae slender, scarcely 

 reaching beyond the basal fifth of the elytra ; all the tarsi narrow, 

 the basal three joints all distinctly spined at the end. Last 

 ventral segment with rounded hind margin. 



Lew/th 29-49 ; breadth 10-16 mm. 



Hob. Mysore and Madras ; (?) Siam. 



2. Dorysthenes montanus, Guer. (Cyrtognathus) Rev. Zool. 1840, 

 p. 39, pi. i, fig. 5. 



c? . Almost entirely reddish brown in colour, the head only 

 being dark brown. Eyes smaller than in D. rostratus and more 

 distant from each other above, the scape of the antennae reaching 

 beyond their hind margin. Pronotum rather closely punctulate, 

 not very glossy, its breadth across the base one-third greater 

 than its length along the middle. Elytra only slightly glossy. 

 Anterior process of prosternum very broad at the base, gradu- 

 ally narrowed to the apex, its front face almost vertical and its 

 hind one inclined so as to lie nearly in the same plane as the 

 posterior part of the prosternum. Front tarsi rather strongly 

 dilated, much broader than the hind ones, the first joint but 

 little longer than broad and a little longer than the second joint. 

 Hind breast not very densely covered with tawiiy pubescence. 

 $ . Differs from the male as in D. rostratus. 



Length 26-44 ; breadth 9-15 mm. 



Hab. Southern India : Coonor, Nilgiris and Anaimalai Hills ; 

 (?) Burma. 



Genus DISSOSTERNUS. 



Dissosternus, Hope, Proc. Zool. Soc. i, p. 64 (1833) ; id. Trans. ZooL 

 Sue. i, p. 106 (1834) ; Lacord. Gen, Coleopt. viii, p. 53 (1869). 



Type, D. pertii, Hope. 



Range. That of the type species. 



c? . Head and mandibles as in Dorysthenes, but with the eyes 

 smaller. Antennae reaching considerably beyond the middle of 

 the elytra, 12- jointed, the joints from the fourth to the tenth 

 strongly compressed and produced each into an acute angle or 

 tooth at the apex on the anterior side. Pronotum convex, each of 

 its lateral angles produced into a strong tooth or spine at the 

 middle and a shorter tooth between the middle and the front 

 margin ; its hind angles slightly projecting and feebly dentate. 



