46 Memoirs of the Indian Museum. [Vol. VII , 



head without and behind the ridges ; in front of this groove and between the ridges it is 

 matt. 



The marginal grooves of the pronotum are more finely and evenly punctured than 

 in P. quinquecornutus. The coarse punctures on the sides of the pronotum are less 

 numerous than in that species, and a pair of punctured scars are evident ; there are a few 

 coarse punctures on the dorsal surface as well as at the sides. 



The scutellum is without punctures. The mesothoracic episterna, mesosternum 

 and abdominal sterna resemble those of P. quinquecornutus ; the metasternum is more 

 extensively punctured in the posterior intermediate areas. The punctures in the grooves 

 of the elytra, and the spines on the middle and posterior tibiae, are not quite so 

 pronounced as in that species. 



Chondrocephalus purulensis (Bates). 

 Fig. VI, 3 ; p. 45. 

 Popilius fimdensis, Bates, 1886, p. 13. 



One specimen from Guatemala, 2 2 '8 mm. long. 



The anterior margin of the labrum is slightly concave, and the sides are slightly 

 convergent behind. There are no inner tubercles. The frontal ridges, which are flattened 

 above, are straight and meet in a more obtuse angle than in either of the preceding species ; 

 they and the clypeus are glossy, the whole of the triangular area bounded by them being 

 matt. In other respects the head resembles that of C. cordiger, as do also the antennae 

 and mandibles. 



The pronotum resembles that of C. cordiger in form, but the scars are more pronounced 

 and there are no coarse punctures on the general surface, either at the sides or nearer the 

 middle. The scutellum bears a group of punctures on either side of the middle line ; in 

 other respects the mesothorax resembles that of the two preceding species. „ The 

 metasternum bears a few punctures in the inner angles only of the posterior intermediate 

 areas. The abdominal sterna, elytra and legs resemble those of C. cordiger. 



Chondrocephalus granuliîrons (Bates). 

 Fig. VI.. 4, p. 45. 

 Popilius granulifrons, Bates, 1886, p. 12. 



Numerous specimens from Guatemala, 26-2-32-2 mm. long. 



C. granulifrons differs from C. purulensis in having the frontal ridges (which meet in a 

 right angle) less flattened above, with the inner tubercles more or less imperfectly developed 

 and sometimes united. The small area behind and between the inner tubercles is glossy, 

 that between the inner and outer tubercles matt, and the clypeus more or less rough and 

 glossy. The puncturing on the scutellum is variable. The spines on the middle and bind 

 tibiae are stronger. 



Genus VINDEX, Kaup, 1871, p. 78. 

 Type, Passalus agnoscendus, Percheron, 184 1, p. 22, pi. lxxviii, fig. 2. 



