156 HERPESXID^. 



• The teeth are normal ; they are all much more bulky and broader 

 than in any of the other species of the genus which I have seen ; 

 the hinder upper false grinder is triangular, with nearly equal sides ; 

 the flesh-tooth is very strong, the front edge being nearly four- 

 fifths of the length on the outer side ; the first tubercular is not 

 twice as broad as the length of the outer edge. The brain-case is 

 about five-eighths of the entire length. The hinder part of the 

 palate contracted, flat, with a diverging crest on each side above, 

 and a ridge on each side below, with the aperture transverse, in a 

 line with the base of the lateral crest. The buUse large, vesicular, 

 rounded below and behind. Length of the skull 3j^ inches ; width 

 of brain-case 1|-| inch, at zygomatic arch 2^ inches. The zygoma- 

 tic arch, in comparative length and convexity, is very like that of 

 the skull of H. ichneumon. Lower jaw strong, short, with a distinct 

 chin-angle in front ; teeth very large and strong; tubercular oblong, 

 longitudinal, large, with two anterior and one broad hinder lobe ; 

 the angle behind with flattened expanded processes. 



3. Athylax robustus. B.M. 



Brown, very minutely and closely punctured ; the head blacker, 

 with a subvertical band; the edge of the lower jaw and cheeks under 

 the ears yellowish, not punctulated ; legs and feet nearly black ; tail 

 black-brown, punctulated. 



Athylax robustus, Gray, P. Z. S. 1864, p. 558. 



Edb. Africa : " White NUe " (no. 6168, adult; no. 6169, younger) 

 (Parzudalci). 



Very Kke A. paludosus, but paler, and with pale cheeks ; the 

 teeth axe very large and strong, like those of the A. palvdosus variety 

 from Guinea. 



Lower jaw like that of A. paludosus, but not quite so strong, and 

 more sloping in front ; the compressed teeth rather large ; the tu- 

 bercular oblong, elongate, moderate, with two large lobes in front, 

 and one larger behind. 



Skull elongate ; nose short, thick ; forehead convex ; orbits com- 

 plete. Teeth 36 ; the false grinders f , with a short space be- 

 tween the canine and the first false molar, where a small tooth may 

 have fallen out. The false grinders triangular, with a triangular 

 tubercle on the middle of the inner side. The flesh-tooth massive, 

 triang^ar, nearly as wide in front as long on the outer side, with a 

 large internal tubercle in a hne with the front edge. Tubercular 

 grinders transverse ; the front triangular, much wider than long, 

 outer edge oblique, inner edge narrow ; hinder one oblongj much 

 smaller. The hinder part of the palate produced nearly to a line 

 with the condyles, keeled on each side, and with a strong keel on 

 each side of the lower surface, edging the very narrow contracted 

 hinder opening. Ear-bullse very large, vesicular, rounded below and 

 behind. Lower jaw strong, solid, nearly as high behind as in front; 

 chin shelving ; gonyx long, the angle producfid, bent up at the end, 



