of the Amazon Valley. 403 



Genus Dihammophora. 



Chevrolat, in Thorns. Arc. Nat. p. 50; Lacord. Gen. ix. 



108. 



1. Dihammophora nitidicolUs, n. sp. 



Nigra, opaca ; thorace Isete rufo, sericeo-nitente, elon- 

 gsbto, inasquali, medio dorsi convexo, postice bitubercu- 

 lato ; elytris ante apicem dilatato-rotundatis, supra grosse 

 lineatim punctatis, bicostatis; antennis corpore multo 

 brevioribuSj articulis 3-11 subsequalibus, leviter serratis; 

 abdomine argenteo-tomentoso. 



Long. 2| lin. 



Hah. — St. Paulo, Upper Amazons. 



2. Dihammophora pusilla, n. sp. 



Angustissima, linearis, nigro-picea, opaca; thorace 

 angusto, cylindrico, haud tuberculato, rufo-opaco ; elytris 

 ante apicem gradatim rotundatis, grosse lineatim punc- 

 tatis, bicostatis ; antennis corpore multo brevioribus, 

 decem-articulatis, articulo lOmo longiori, crassiori; ab- 

 domine argenteo-sericeo. 



Long. 2^ lin. 



Hab. — Villa Nova ; on flowers. 



Allied to D. perforata, Klug, from which it differs, inter 

 alia, in the head being entirely black. 



Sub-fam. Rhopalophorin^. 



Genus Rhopalophora. 



Serville, Ann. Soc. Ent. Fr. 1834, p. 100 ; Lacord. Gen. 



ix. 110. 



1. Rhopalophora atramentaria. 



Listroptera atramentaria, White, Cat. Longic. Brit. Mus. 



p. 208. 



Rhopalophora vidua, Chevrolat, in Thorns. Arc. Nat. p. 59. 



Elongata, plana, nigro-velutina, antennis pedibusque 

 nitidis; elytris utrinque vitta latissima suturali griseo- 

 tomentosa; corpore subtus argenteo-tomentoso. 



Long. 6-7 lin. c? ? . 



Hah. — Altar do Chao^ River Tapajos. Abundant. 



