StophyUnidcE of tlie Amazon Valley. 349 



sides very close to the eyes, only slightly deflexed in the 

 middle ; the surface rather coarsely but not closely punc- 

 tured. Thorax about as long- as broad, a good deal nar- 

 rowed behind but hardly at all curved at the sides, irre- 

 gularly punctured ; the middle with two series of punctures, 

 divergent towards the front, joined together in front of 

 the base, and slightly impressed behind, the front part of 

 the included space bearing large punctures, so that only 

 a small part behind is free from them ; outside these 

 central series are a few punctures scattered at the sides. 

 Elytra about one and a half times the length of the thorax, 

 coarsely but not closely punctured, the punctures more 

 sparing towards the apex, f lind body with the four basal 

 segments with imbricate sculpture, the two apical ones 

 smooth. Legs pale yellow, rather long. 



The female has the dorsal plate of the 7th segment of 

 the hind body with a curved emargination on each side, 

 between which the hind margin is a little rounded, but 

 slightly truncate in the middle ; the ventral plate has the 

 hind margin almost truncate, but with a slight emargina- 

 tion in the middle. 



Ega ; two female individuals. 



12. Palaminus anceps, n. sp. Niger, antennis, palpis, 

 pedibusque pallide flavis ; thorace basin versus minus an- 

 gustato, lateribus rotundatis, sat creljre irregulariter punc- 

 tato, lateribus parce punctatis ; ely tris sat crebre punctatis. 

 Long. corp. 3 lin. 



ISIas : abdomine segmento 7" dorsali medio rotundato ; 

 ventrali producto, apice subovali, medio excisione parva. 



Fem. incog. 



This insect resembles extremely the P. niger, but has 

 the thorax rather different, the sides being a little more 

 curved, but less narrowed behind, and the elytra are 

 slightly more finely and closely punctured ; these diffe- 

 rences are but slight, and it is possible that the single 

 individual I have seen may be the male of P. niger. 



The dorsal plate of the 7th segment of the hind body is 

 much rounded in the middle, and deeply sinuate on each 

 side ; the ventral plate is a good deal produced, and the 

 produced part would have the form of half of an oval 

 plate, Avere it not for a small notch in the middle at the 

 extremity. 



Ega. 



