Stapliylinidoi of the Amazon Valley. 341 



1. Palamlnus simplex, n. sp. Testaceo-ferrugineus, 

 antennis, pedibus, palpisque pallicle testaceis ; prothorace 

 elongate, basin versus angustato, intequaliter punctate. 

 Long. Corp. 2g — 2| lin. 



JNlas et femina : abdomine segmento 7° ventrali sim- 

 plice. 



An elongate and slender species. Anteniife almost 

 Avliite, longer than head and thorax ; 3i*d joint elongate, 

 longer than the 2nd joint; 11th joint simple, scarcely so 

 long as, and slightly broader than, the 10th. Palpi pale 

 yellow, with the last joint very large. Head yellow, the 

 vertex slightly emarginate, the eyes reaching very near to 

 the back of the head, Avith a fine margin behind them ; 

 the surface is rather coarsely punctured, the punctures, 

 however, not sharply defined, and become more obsolete 

 and sparing towards the vertex. Thorax fixlly as long as 

 broad, the sides not curved but much naiTOwed behind ; 

 the surface rather coarsely and irregularly punctured, the 

 punctures towards the sides more indistinct than about 

 the middle, the smooth spaces not conspicuous. Elytra 

 slender but considerably broader than, and about one and 

 a half times the length ofj the thorax ; deeply emarginate 

 behind, so that the outer angle reaches considerably farther 

 back than the suture ; ferruginous yellow, slightly darker 

 about the sviture ; rather deeply and moderately coarsely 

 punctured, the punctuation at base rather close, sparing 

 at the extremity. Hind body slender, darker and less 

 shining than the other parts, ferruginous ; the four basal 

 segments coarsely sculptured, the two apical ones smooth. 

 Legs slender and elongate, almost Avhite, basal joint of 

 hind tarsus forming rather more than half the length of 

 the tarsus. 



The 7th abdominal segment is nearly similar in the 

 two sexes, and shows no peculiar structure ; the terminal 

 joint of the maxillary palpi is, however, considerably larger 

 in the male than in the female, and the dorsal plate of 

 the 7th segment is just a little more prolonged in the 

 middle. 



Tapajos, Ega; five individuals, 3 $ ,2 ? ; also a female 

 indi\ddual from Tapajos, which is much broader than the 

 Ega specimens, so that I think it probable a knowledge 

 of the male might show it to be a distinct species. 



2. Palaminus longicornis, n. sp. Ferrugineus, anten- 

 nis, pedibus, palpisque pallide testaceis; capite vertice 



