of the Amazon Valley. 397 



triangulari communi vittam approximante, et fascia an- 

 gustiori versus apicem, laete flavis ; subtus macula magna 

 metasterni, ventrisque segmentis duobus basalibus, flavo- 

 tomentosis; antennis subclavatis, nigris. 



Long. 4^ lin. 



Hab. — Obydos, Guiana side of Lower Amazons. 



3. Mecometopus Wallacii. 

 Clytus Wallacei, White, Cat. Longic. Brit. Mus. p. 259. 



Cylindricus, ater ; thorace breviter oblongo-rotundato, 

 elytris pauIo angustiori, cinereo vage fasciato; scutello, 

 elytrorum vitta abbreviata obliqua prope basin, et macula 

 triangulari communi vittam approximante, laete flavis, 

 vitta lata ante apicem grisea ; subtus macula magna me- 

 tasterni, ventrisque segmentis duobus b%;salibus, flavo- 

 tomentosis; antennis tenuibus, apice subclavatis, piceo- 

 rufis, clava pallida. 



Long. 4^ lin. 



Eah. — Esra. 



4. Mecometopus triangularis: 



Clytus triangularis, Lap. & Gory, Monogr. p. 31, pi. 

 vii. f. 38. 



Gracilis, cylindricus, niger, capite rufo-piceo, antennis 

 dimidio apicali pallido ; thorace oblongo-ovato, obscure 

 griseo, medio nigro ; elytris margine basali, fascia valde 

 obliqua abbreviata, macula ti'iangulari communi ante 

 medium, et triente apicali, griseis ; metasterno fasciisque 

 duabus ventris basalibus flavo-cinereis. 



Long. 4 lin. 



Hab. — Para. 



5. Mecometo'pus Icetus. 



Clytus Icetus, Fabr. Syst. El. ii. 348. 



Cylindricus, niger, capite antennis et thorace fulvo- 

 rufis; hoc oblongo, lateribus vix rotundato, postice 



