DESCRIPTIONS OF NEW SPECIES. 117 



confused elytral sculpture, have the middle lobe of the mentum 

 broader and the lateral lobes less distinct than in the other 

 groups of species : the middle lobe is broadly rounded in front, 

 and in the present species is slightly transverse, with the lateral 

 lobes small, inflexed, and scarcely visible; thus approaching the 

 new genus Discogenia, in which they disappear entirely. 



E. clavicornis makes an exception to the other small species, 

 which requires it to be separated as a distinct group : the middle 

 lobe of the mentum is prominent, elevated, and triangular as in 

 the larger species of the genus. 



DISCOGENIA LEC. 



Eleodes scabricula Lee., and marginata Esch., differ from the 

 other species which have been referred to the genus, by the 

 mentum being quite flat, not at all trilobed, but transverse, 

 widened .from the base to the middle, then rounded, both at the 

 front and sides, the lateral angles being also rounded at tip ; the 

 surface is punctured, and is foveate each side near the lateral 

 angle. The thorax is broader than long, much rounded and finely 

 margined at the sides, with the hind angles not prominent ; it is 

 feebly emarginate in front, with the front angles nearly obtuse. 

 The elytra are oval, not wider than the prothorax, pointed behind, 

 considerably rounded on the sides, and without humeral angles, 

 so that they are more distant from the prothorax than in any 

 species of Eleodes. The front thighs are unarmed, in the female, 

 slightly angulated beneath in the males ; the tarsi are alike in 

 both sexes. 



But two species named above are known to me. I regard E. 

 fischeri Mannh. as a large and well developed form of E. 

 marginata. 



BLAPSTI1VUS WATERHOUSE. 



39O. II. olbliqims. Ovalis convexus, ater, pube fusca minus subtili 

 vestitus, capite thoraceque punctatis, hoc latitudine duplo breviore, a 

 basi antrorsum angustato, lateribus obliquis paulo rotundatis, basi late 

 bisinuata, dense ciliata, angulis posticis obtusis ; elytris striis profundis 

 punctatis, interstitiis paulo convexis subtilius sat dense punctatis. 

 Long. -32. 



One specimen, collected at Cape San Lucas, Lower California, 

 by Mr. Xantus. Larger and more convex than B. crassus Lee., 



