OtlDER COLEOPTERA. 541 



lar : they will compose the first tribe Pimeliarice, so named 

 from the genus 



PlMELIA, of Fab., 



Which is the most numerous of it. 



Sometimes the mentum is more or less heart-shaped, with 

 the upper edge either emarginated in the middle, and as if 

 divided into two short and rounded lobes, or broadly emar- 

 ginated or widened. 



Here the last two articulations of the antennae, or the tenth 

 and eleventh, always distinct, sometimes unite to form an 

 ovoid or pyriform body, or are evidently separated from each 

 other. The upper edge of the mentum is round and emar- 

 ginated in the middle, or as if divided into two festoons. 



These have the anterior edge of the head nearly straight, 

 or but little advanced in the middle, without a deep emargi- 

 nation, and fitted to receive the mentum, and the lateral edges 

 simply and slightly dilated above the insertion of the an- 

 tennas ; their head does not appear sensibly to be narrowed 

 behind, nor enlarged and truncated in front. The corslet is 

 not at all heart-shaped, deeply emarginated in front, and trun- 

 cated behind. 



We may separate from the last, those which have the ante- 

 rior edge of the head straight, or nearly so, without angular 

 or tooth-formed dilatation in the middle ; the labrum is 

 nearly square, of middle size, and entirely exposed ; the 

 corslet transverse, and the abdomen very voluminous and 

 swollen. 



Those with the body more or less ovoid or oval, with the 

 corslet narrower, even at the base than the abdomen, gene- 

 rally convex, without sharp elongations to the posterior 

 angles, or posterior projections to the presternum, compose 

 the sub-genus, properly called. 



