of the Amazon Valley. 427 



flexuDsa, maculisque ■ tribus . basalibus interdum partim 

 confluentibus, nigris ; antennis articulis Imo et 3-5 nigris, 

 dense hirsutis, apice ruj&s glabris, 6-11 flavis. 



Long. 12-16 lin. c? 9 • 



Hob. — Amazons ; general, but not common. Flying 

 heavily along pathways in the forest. 



The description of Linneeus applies to the Amazons 

 insect, which belongs to the darker Guiana form. The 

 figure of Olivier (No. 67, pi. vii. f. 48) seems rather to 

 apply to the distinct South Brazilian form {L. Latreillei, 

 White) . 



Genus Cekagenia. 



Serville, Ann. Soc. Ent. Fr. 1834, p. 32 ; Lacord. Gen., 

 ix. 158. 



1. Geragenia hicornis. 



Ceramhyx hicornis, Fabr. Syst. El. ii. 274. 



Ceramhix striatus, Oliv. Ent. No. 67, pi. v. f. 31. 



Fulva, tomento sericeo-aureo vestita ; antennis articulis 

 2-6 apice et 7-11 totis fuscis ; thorace tuberculis duobus 

 disci compressis, linea mediana, tuberculisque lateralibus 

 nigris; elytris apice breviter truncatis, supra vitta mar- 

 ginali, altera discoidali, et maculis duabus interioribus, 

 nigris. 



Long. 8-9 lin. $ ^ . 



Hah. — Amazons, general ; at sweet sap on trunks of 

 trees, common. Olivier confounded this species with G. 

 (Trachyderes) striatus ; his description, however (No. 67, 

 p. 27) applies exclusively to the Trachyderes. 



2. Geragenia spinipennis, n. sp. 



G. hicorni simillima, minor, differt solum colore paulo 

 pallidiori et elytris apice utrinque longe unispinosis. 



Long. 7 lin. c? ? • 



The form, sculpture, and markings are the same as in 

 G. hicornis, but the colour is decidedly paler, and the 

 silky pubescence is paler golden. The apex of the elytra 

 is briefly truncate, with the extei'ior angle prolonged 

 into a rather long acute spine, which does not exist in 

 any of the numerous specimens I have examined of G. 

 hicornis. 



Hah. — Ega. 



