BY THOMAS G. SLOANE. 401 



species that, from the description, might be mistaken for C. cog- 

 yiahim, l)ut it has the prothorax shaped as in C. transversicolle, 

 Chaud., with marked and prominent posterior angles. 



Carenum gracile, n.sp. 



Elhptic-oval, depressed, h>?vigate ; head transversely impressed 

 across vertex ; suborbital channel to receive antennae wide, short, 

 the median ridge hardly indicated ; gulge defined from gense ; pro- 

 thorax transverse, lightly narrowed behind posterior angles, base 

 not lobate, widely sinuate in middle ; elytra short, 4-punctate, 

 inflexed margin wide ; anterior tibise bidentate. 



Head, prothorax and underparts shining black ; prothorax with 

 faint narrow violet margin ; elytra of a splendid metallic violet 

 colour, becoming steel blue towards sides and on inflexed margins. 

 Head light (2-5 x 3-5 mm.), front smooth, declivously depressed ; 

 frontal sulci not deeply impressed, short, curved, their posterior 

 part hardly stronger than their anterior part ; a well-marked 

 transverse impression crossing the vertex a little behind the pos- 

 terior supra-orbital puncture ; pre-ocular sulcus short, wide, lightly 

 impressed ; pre-ocular process small ; eyes hemispherical, projec- 

 ting ; two supi'a-orbital punctures on each side. Prothorax trans- 

 verse (3-2 X 4-6 mm.), lightly rounded on sides, narrowed rather 

 obliquely behind posterior angles ; base wide, lightly emarginate ; 

 anterior margin emarginate ; anterior angles lightly advanced ; 

 border narrow, reflexed, thicker and more strongly reflexed on 

 base, thus causing a light sinuosity on each side just before the 

 base ; median line strongly impressed ; a strong curved transverse 

 impression a little before the basal margin ; three marginal punc- 

 tures on each side as in C. anthracinum. YXytvo. short, ovate, 

 wider than prothorax (7x5 mm.); sides strongly rounded ; base 

 truncate between the shoulders, these rather j)rominent; apex 

 widely rounded ; border reflexed, thickened and lightly turned 

 back at humeral angles to form a short erect projection ; margin 

 wide on apical curve ; two discoidal punctures on each elytron, 

 the anterior a little distance (about 0-8 mm.) behind the humeral 



