nitid and sparsely punctured in front and between the supra- 

 orbital carinae, very closely punctate or granulate and opaque 



behind ; eyes large, not very 

 widely separated above, the 

 space between them rather 

 less than a third of the 

 whole width of the head ; 

 mandibles variable in size and 

 form. In large specimens 

 they are longer than the head, 

 divergent from the base to- 

 middle and thence gradually 

 incurved to the tip, each 

 armed with two or three 

 strong teeth on the inner 

 side between the middle and 

 the tip ; in small males they 

 are similar in size and form 

 to those of the females. 

 Antennae 12-jointed, with 

 the joints from the fifth to 

 the eleventh produced each 

 into a strong dentiform pro- 

 cess at the apex. Pronotum 

 unevenly convex, sparsely 

 punctured and glossy in the 

 middle, closely punctured 

 and more or less pubescent 

 near the sides ; front and 

 hind margins fringed with 

 tawn hairs. Eltra for the 



Fig. 9. 

 Acnnthophorus serraticornis, Oliv., 



most part coriaceous and dull, but sparsely punctured and glossy 

 near the base ; each with a very closely punctured basal spot. 

 Breast pubescent. 



$ . Mandibles not so long, straight from the base to the middle 

 or thereabouts, incurved at the end, armed with several teeth 

 along the inner edge. Antennas shorter ; last ventral segment 

 longer and rounded at the apex. 



Length 53-92 ; breadth 17-28 mm. 



Hob. Madras ; Mysore ; Trivandrum. 



21. Acanthophorus rngiceps, Gahan, A. M. N. H. (6) xiy, p. 22S 



(1894). 



3 . Brownish-black in colour. Head large, strongly rugose 

 except along the middle ; eyes widely separated above, the space 

 between them more than half of the whole width of the head 

 and not impressed with a distinct median groove ; the supra- 

 orbital ridges prominent, continued back a short distance beyond 

 the eyes ; mandibles long and curved, armed each with three 

 or four teeth on the inner side between the middle and tip. 



