of the Amazon Valley. 329 



2. Acyphoderes odyiLHToldts. - 

 White, Cat. Longic. Brit. Mus. p. 196, pi. v. f. 3. 



Angustatus, niger ; thorace oblongo-ovato, costistribus 

 elevatis grosse punctatis, interstitiis aureo-tomentosis ; 

 elytris apiceni segmenti ventris tertii attingentibus, atten- 

 uatis, valde dehiscentibus, apice acuminatis, pallide tes- 

 taceo-fulvis, vitreis, margine prope humeros fusco, baud 

 profunde punctate; abdomine vespiformi, cinctubus 

 quatuor flavis ; pedibus gracilioribuSj femoribus ciavatis. 



Long. 7 lin. c? ? • 



Found on tbe flowers of a low tree called Pitomha, 

 and bears the most deceptive resemblance to a species 

 of wasp seen on the same flowers. I was never sure 

 whether I had captured the beetle or the wasp, until 

 I had closely examined the insect in the bottom of the 

 net. 



Hah. — Santarem. 



Genus Tomopterus. 



Serville, Ann. Soc. Ent. Fr. 1833, p. 544 ; Lacord. Gen. 

 viii. 509. 



Distinguished from Odontocera by the short subquadrate 

 elytra, which do not pass the level of the posterior coxa) ; 

 and from Acyphoderes by the same character, and by the 

 convex closely punctured thorax. 



1. Tomopterus ohliquus, n. sp. 



T. staphylino valde afiinis, difiert elytris prope suturam 

 oblique truncatis. Niger, opacus ; antennis rufescentibus, 

 f us co-macula tis; thorace grosse reticulato-punctato, mar- 

 ginibus antico et postico fasciaque mediana medio inter- 

 rupta aureo-tomentosis ; elytris brevibus, extus et apice 

 rotundatis, prope suturam oblique truncatis, basi fascia 

 rufescente, disco linea obliqua flava; scutello nigro, apice 

 aureo-tomentoso ; pectore utrinque aureo-bifasciato, ab- 

 dominis segmento prime rufo, reliquis aureo-marginatis ; 

 pedibus rufescentibus, femoribus basi albo-testaceis. 



Long. 3^ lin. ($ . 



Hah. — River Tapajos. 



