of the Amazon Valley. 399 



cylindricus, niger, capite thorace antennisque basi fulvo- 

 rufis, his clava piceo-nigra ; thorace postice utrinque 

 macula magna cinei-eo-flava; scutello laste flavo; elytris 

 humerisj macula obliqua triangular! basi angulata versus 

 basin ascendente, macula communi triangularis et fascia 

 angusta biarcuata postica, laete flavis ; prothorace subtus^ 

 pectore, fasciisque quatuor ventralibus flavis; pedibus 

 nigris. 



Long. 44 lin. 



Rah. — Ega. 



9. Mecometopus Flavins, n. sp. 



Cylindricus, niger, capite, thorace, antennisque basi 

 fulvo-rufis, his clava piceo-nigra ; thorace postice utrinque 

 macula cinerea ; scutello Isete flavo ; elytris macula magna 

 rotundata (prope humerum incisa) , altera communi rhom- 

 boidea, fasciaque (prope suturam valde dilatata), laete 

 flavis ; pectore segmentisque quatuor ventralibus flavis ; 

 pedibus nigris. 



Long. 5 lin. 



Hah. — Santarem.* 



10. Mecometoinis troglodytes. 



Clytus troglodytes, Lap. & Gory, Monogr. p. 33, pi. vii. 



f. 41. 



Breviter cylindricus, niger ; thorace ovato ; elytris 

 linea angusta abbreviata obliqua prope basin, macula 

 parva communi triangulari, linea transversa pone medium, 

 albis; antennis brevibus, clava tis. 



Long. 3 1 lin. 



Hah. — Para. 



* The following is a new sijecies allied to M. loetus, but different from 

 the preceding, and from all those described by MM. Chevrolat and 

 Thomson. 



Mecometopus Jansoni, n. sp. 



Cylindricus, niger, capite et thorace ferrugineo-rufis ; hoe subgloboso, 

 postice angustato ; scutello flavo ; elytris macula magna ovata prope 

 humerum, altera parva communi obcordata, fasciaque postica lata recta, 

 IsGte flavis ; pectore segmentisque duobus ventralibus ciuereo-flavis ; 

 pedibus nigris. 



Long. 5 lin. 



Hab. — Chontales, Nicaragua (Janson fil.) 



