434 Mr. H. W. Bates on Geramhycidcn 



? . Thorace toto rufo, lateribus tri-tuberculatis, dorso 

 laevi, polito, medio foveis tribus scabrosis, tuberibus 

 laevibus marginatis et separatis ; elytris l^evissirnis, basi 

 late rufis ; antennis diraidium corporis paulo superantibus, 

 fulvo-rufis, articulis apice leviter infuscatis. 



Long. 5-12 lin. S ? • 



Generally distributed throughout the Amazons region. 

 In newly-burnt clearings in the forest^ on dead trees, 

 sometimes abundant. 



It is so variable that two individuals can scarcely be 

 found nearly alike. Dupont failed to notice the sexual 

 differences in form and colours, and hence described 

 them as distinct species, besides giving each variety as 

 distinct. Five or six other of his species are probably 

 only varieties of this. 



9. Trachyderes conformis. 



Dupont, Mag. Zool. 1838, p. 49, pi. clxiii. f. 2. 



Angvistus, flavo-testaceus J vertice thoraceque nigro- 

 maculatis; elytris apice truncatis, angulo exteriori leviter 

 dentate, supra tertia parte posteriori nigra, nigredine 

 ramospermarginem fere ad humeros et per suturam usque 

 ad scutellum emittente ; antennis et pedibus fulvo-testa- 

 ceis, illis apice infuscatis, his femoribus apice nigris. 



Long. 7-8 i lin. ^ ? . 



Hab. — Santarem. 



Closely allied to T. dimuliatus, Fabr., the chief differ- 

 ence (which is constant) being that the black colour of 

 the apical portion of the elytra in dhnidiatus does not 

 emit a branch along the suture towards the scutellum. 

 This speciality is mentioned in Fabricius' description, 

 and applies to the form from South Brazil. T. conformis 

 occurs also in Venezuela. • 



Genus Oxymerus. 



Serville, Ann. Soc. Ent. Fr. 1834, p. 50 ; Lacord. 

 Gen. ix. 204. 



