of the Amazon Valley. 405 



et dorso trinodoso ; scutello argenteo ; elytris velutinis, 

 pone medium utrinque prope suturam macula obliqua 

 argentea; antennis articulo 3io apice infra nigro-peni- 

 cillato^ 5to scopa magna nigra, Gto scopa parva alba. 



Long. 6. lin. S • 



Hah. — River Tapajos. 



Olivier's description is good, but his figure is very 

 bad. 



3. Cosmisoma argyreum, n. sp. 



Minus robustum, elongatura, depressum", nigrum ; tho- 

 race subcylindrico, vix constricto, medio haud tumido, 

 nitido, supra aequali, punctulato; scutello argenteo ; ely- 

 tris utrinque medio linea lougitudinali argentea; antennis 

 articulo oio apice infra nigro-penicillato, 5to scopa magna 

 nigra, Gto sparsim argenteo-pubescente ; corpore subtus 

 tenuiter argenteo-pubescente ; abdomine subglabro. 



Long. 4-54 liii- 



Eah. — Bga. Very abundant, occasionally, at flowers. 



'^ 4. Cosmisoma speeuliferti7n. 

 Ceramhyx specuUfer, Gory, in Guer. Icon. R. A. p. 231. 



Elongatum, depressum, nigrum ; thorace antice et 

 postice constricto, medio turaido, dorso quadrinodoso ; 

 scutello argenteo ; elytris apud medium plaga magna 

 communi subquadrata argentea; antennis articulis 1-4 

 sparsim ciliatis, 5to scopa magna nigra, Gto scopa parva 

 argentea; corpore subtus argenteo-tomentoso. 



Long. G lin. cJ. 



Hah. — Para. 



5. Cosmisoma lineelhim, n. sp. 



Parvum, gracile, nigrum ; thorace subcylindrico, elon- 

 gato, vix constricto, medio haud tumido, supra paulo 

 inaequali, lateribus insequaliter grosse punctatis, parte 



TRANS. ENT. SOC. 1870. — PART IV. (DECEMBER.) P P 



