Mr. A. Murray on Coleoptera from Old Calabar. 457 



thorax not being twice as broad as long, and the exterior margins 

 not sloping so much inwards towards the tooth on the sides of the 

 thorax, so that the thorax looks rather more quadrate. The ridge 

 running down the elytra from the shoulder has less appearance 

 of sinuation, though it is so slight in either, that it scarcely de- 

 serves to be spoken of. The impressions on the third stria seem 

 also diiFerent, the two posterior impressions being placed further 

 back; but, as they vary in different examples, and even on dif- 

 ferent elytra of the same individual, no value can be placed on 

 this character. In other respects the description of S. Hercules 

 will apply also to this. It is still more nearly allied to >S^. Feist- 

 hamelii, Laferte. It is, however, larger and more massive, the 

 striae on the elytra seem more defined and less punctate, and 

 the thorax is comparatively narrower, particularly in front, the 

 length of both being nearly the same (3 lin.), while the greatest 

 breadth in front of >S^. Feist hamelii is 4| lin., and in Ajax 

 5i lin. 



It is possible that a larger series of specimens may show these 

 two to be the same species ; but, until we obtain this, I have 

 preferred to keep them distinct. 



3. S. Patroclm, mihi. 



Niger, nitidus, elongatus, subcylindricus ; tibiis anticis triden- 

 tatis, postice quadridenticulatis, subtus transverse corrugatis ; 

 mandibulis thorace brevioribus, oblique corrugatis; mento 

 corrugato, carina media parato ; capite antice longitudinal iter 

 corrugato, fronte bifoveolato ; thorace parum convexo, sesqui 

 latiore quam longiore, lateribus antice fere parallelis, ad an- 

 gulos posticos leviter papilloso ; elytris parallelis, parum con- 

 vexis, anguste marginatis, punctato-striatis, carina basali, vix 

 dente humerali paratis, et sine carina longitudinali, ad basin 

 et lateribus usque ad apicem papillosis; subtus prosterno 

 truncato. 



Long. 15 lin., lat. 4| lin. 



Black, shining, elongate, subcylindric. Mandibles not longer 

 than the thorax ; left mandible with one large subquadrate tooth, 

 right mandible with two; the upper side with two ridges or 

 keels on the exterior side, and the whole furrowed with strong, 

 oblique corrugations curving inwards. Labrum longitudinally 

 corrugated, with three projections or teeth, and a large, deep 

 puncture in the middle of the central projection. Head corru- 

 gated longitudinally in front, and with two longitudinal frontal 

 fovese, turning off transversely towards the exterior anterior 

 angle ; a ridge or projection in front of the eye, and a very slight 

 swelling behind the eye encroaching on part of it. Mentum 



