Stap liy I'm idcR of the Amazon Va llcy . 351 



tudlnal clepi'ession ; the surface convex, coarsely, distinctly 

 and rather closely punctured. Thorax not so long as 

 broad, a little rounded at the sides, and narrowed behind ; 

 in the middle is a smooth shining space, not reaching the 

 front, and on each side of this the surface is slightly de- 

 pressed, the depressions coarsely and closely punctin-ed ; 

 towards the sides, in the middle, are some other punctures, 

 as also in front of the smooth space, and a few at the lateral 

 margins and base. Elytra more than one and a half times 

 the length of the thorax, distinctly and rather closely punc- 

 tured, the punctures becoming only a little more sparing 

 towards the extremity, but the apical margin quite smooth 

 and impunctate. Hind body slender ; tlie four basal seg- 

 ments Avith imbricate sculpture, and the anterior portion 

 of the following segment with similar but less distinct 

 sculpture. Legs pale yellow, rather long. 



The male shows little peculiarity in the structure of the 

 7th segment of the hind body. 



Tapajos ; a single male specimen. 



Ohs. — This species greatly resembles P. sobrinus, but 

 may be readily distinguished by the shorter thorax ; the 

 elytra also are more closely ]3unctured. The structure of 

 the ajdeagus is not very dissimilar in the two species, but 

 its size in P. sobrinus is double that of/*, puncticeps. 



15. Palamhius parens, n. sp. Niger, antennis, palpis, 

 pedibusque pallide testaceis ; thorace sat elongato, basin 

 versus angustato, lateribus leviter rotundatis; elytris sat 

 crebre punctatis, apice late Iffivigatis. Long. corp. 2| lin. 



Antennas almost white, rather long, slender ; 3rd joint 

 elongate and slender, much longer than 2nd; 11th joint 

 only slightly broader than 10th. Palpi pale yellow, last 

 joint small (in the female). Head large, a little broader 

 than the thorax ; the vertex greatly emarginate, the vertical 

 line coarse, at the sides remote from the eyes, greatly de- 

 flexed in the middle, and with a narrow inteiTuption ; the 

 front part between the eyes coarsely and closely punc- 

 tured, the vertical portion sparingly punctured, and at 

 the back in front of the line the surface broadly coriaceous 

 and opaque. Thorax about as long as broad, a good deal 

 nan-owed behind, and distinctly rounded at the sides ; the 

 surface coarsely but irregularly punctured, the punctures 

 consisting of two broadly-separated, rather divergent series, 

 between which, on the front portion, are two other series, 



