50 Mr. W. W. Saunders's Characters 



length of the mandibles, which, at times, are almost as short as 

 those of the $ . They have, however, always the same conforma- 

 tion at the apex, which is a good distinguishing character. 



Sp. 6. Platyprosapus platymelus, W. W. S. (PI. III. fig. 7.) 



Pitchy black, with the tibiae pitchy brown. $ Head very 

 broad, transverse, quadrangular, the anterior margin slightly 

 emarginate ; upper surface rather coarsely granulated, nearly 

 flat. Mandibles horizontally porrect, robust, nearly straight, 

 curved inwards towards the apex, gradually tapering, armed in- 

 ternally with one large tooth near the base, and a number of 

 (8 or 9 nearly equal) smaller ones, placed at regular intervals, 

 on the straight portion, and one small one on the curved portion. 

 Antennae rather robust, with the clava small, 4-jointed ; first joint 

 small, armed internally with a curved spine-like projection. La- 

 bium large, transverse, rounded in front, uniform brown. Eyes 

 small, nearly divided into two portions, with an elevated projecting, 

 horizontal ridge of the head, dark shining chesnut. Thorax trans- 

 verse, rather broader than the head, nearly quadrangular, with an 

 obtuse tooth about the middle of the lateral margins, nearly flat 

 above, finely granulated, Scutellum small, semiovate, pointed at 

 the apex. Elytra nearly as broad as thorax, semiovate, with the 

 shoulders prominent, smooth and shining. Legs moderate in 

 length, robust. Anterior tibiae striate and finely punctate, armed 

 externally with a row of 10 to 12 small teeth. Intermediate and 

 posterior tibiae with one pointed tooth on the outer margin, and 

 three short robust teeth at the apex. Underside of body finely 

 punctured, shining. 



Length 2\ inches. Mandibles -^-^ inch. 



A species nearly allied to the Plat-JVestermanni, Hope, but 

 differs in the head being more quadrate and less transverse, and 

 also in the mandibles, which are nearly truncated, and not curving 

 downwards as in that species. 



Sp. 7. Platyprosapus Hopei, W. W. S. (Plate III. fig. 8.) 



Pitchy black. $ with the head very broad, transverse, sub- 

 quadrangular, slightly restricted near the thorax, the anterior 

 margin somewhat emarginate, and the anterior angles excavated 

 for the insertion of the mandibles, and each with a blunt point on 

 the upper part. Upper surface flattened, finely granulated. Man- 

 dibles strong, incurved, horizontally porrect, with one strong tooth 

 about the middle, inclining upwards, longer than the thorax. 



