2-j. [June, 1S74. 



Ozccna, almost solely ou account of the naked antenna; ; in tlie length 

 of these organs they differ much from Ozcena, as defined by Baron 

 Chaudoir, the proportion being scarcely one-third the length of the 

 body, whereas in Ozcena it is more than one-half. The absence of the 

 usual porosity of the antennal joints (from the 5th to the 11th) seems 

 to me a much more important character, and in this they agree with 

 O. dentipes, and differ from all other genera of the group. O. magna 

 also has a pencil of hairs on the back of the maxillae near the tip, 

 which does not exist in Pacliijletes. The palpi are short and thick, 

 with the apical joints dilated. The porosity of the antennae exists in 

 O. magna in a very concentrated state, being confined to a very small 

 pit on each surface of the 7th to the 10th antennal joints near their 

 compressed inner edge, and to the bevelled margins of the large ovate 

 terminal joint. 



The whole insect is deep glossy -black ; the head and thorax 

 sprinkled with fine distinct punctures, and the latter also transversely 

 wrinkled. The form of the thorax is transverse cordate-quadrate, 

 with the lateral sinuation well marked, and the hind angles turned 

 outwards, but not acute, being scarcely rectangular. The eyes are 

 very prominent, and the head narrowed to a nock almost immediately 

 behind them. 



Sao Paulo de Olivenca ; Upper Amazons. One example, which 

 flew at night to a light in my chamber. 



OziENA BEEVICOENIS, Sp. n. 



Aiiguste parallelogrammica, elongata, nigra, nitida ; antennis brcvi- 

 lics, crassis, glahris, punctatis, articulis G-10 hrevissimis et latissimis, 

 Q-IO foveis 11 viargine, porosis ; tliorace transversim quadrato-cordato, 

 postice liaud sinnato, angulis ohtiisis, haud prominulis ; elytris fort iter 

 punctulato-sfriatis, interstitiis omnihus sp>arsissime punctulatis. 



Long. 8 lin. $ . 



Differs from O. magna in the antenna> being shorter, and the 

 joints 6 to 10 much broader and shorter. The thorax also differs in 

 the hind angles not being recurved outwards, nor preceded by a sinu- 

 ation of the sides. The thorax and the interstices of the elytra have 

 fewer fine punctures. 



Peru ; one example. 



The above-described species are further distinguished from 

 Pachyteles, Seythropasus, &c., by the simple large cmargiuation of the 

 anterior tibia?, without projecting upper lobe or tooth, and by the 

 pi'osence of a narrow grooved mcsosternum between the middle coxa% 

 the-mctasteruum projecting in a very loyg nari'ow process. 



