332 !Mr. D. Sliarjj'sj Contrifjiit/'ons to the 



slightly rounded at the sides and a little narroAvcd behind, 

 red suffused with black, the base being more distinctly red 

 than the other parts ; coarsely irregularly and not densely 

 punctured, the punctures leaving a space near the front 

 angles free ; in the middle in front of the base the surface 

 is indistinctly elevated, this ])art also being free from 

 punctures. Elytra one and a third times the length of the 

 thorax, shining red, rather coarsely and sparingly punc- 

 tured. Hind body red, the two apical segments suffused 

 with black, rather sparingly pimctiu-ed. Legs pale yellow, 

 with the coxa3 red. 



In the male the ventral plate of the 7th segment is much 

 produced and narrow at the extremity, the apical portion 

 quite impunctate and shining; the ventral plate of the 8th 

 segment forms part of the intromittent organ ; it is elongate 

 and naiTOw, and furnished at the extremity with two very 

 long processes, which are quite half the length of the rest 

 of the plate. 



Tapajos ; a single male. 



This species bears a very great resemblance to P. bicolor, 

 but may be distinguished by the coloiir of the thorax and 

 hind body ; it is remarkable that, though from the external 

 characters the two insects might almost be supposed con- 

 specific, yet the structm-c of the intromittent organ of the 

 male is extremely different. 



20. Pinopldlus dehilis, n. sp. Subdepressus, piceus, 

 capite thoraceque dilutioribus ; nitidus, antennis, palpis, 

 pedibusque pallide flavis ; thoraceque quadrato, crebre for- 

 titer punctato ; elytris crebre profunde punctatis. Long. 

 Corp. 3| — 3 5 lin. 



Mas: abdomine scgmento 7° ventrali medio producto, 

 apice angusto, rotundato-acuminato. 



Antennai yelloAv ; 3rd joint shorter than 2nd. Paljii 

 pale yellow. Head pitchy red, shining, with two punc- 

 tures in the middle behind the labrum ; behind these four 

 or five on each side in an irregular longitudinal row, and 

 with some others close to the inner margin of the eye and 

 the vertex, the smooth parts with a few distant extremely 

 fine pimctures. Thorax about as long as broad, straight 

 at the sides and not narrowed behind, shining, coarsely 

 punctured, with a space near the fi-ont angles free ; wath no 

 distinct impunctate longitudinal line along the middle, but 

 with the part in front of the base in the middle slightly 



