— 131 — 



O. obsciirellus *. 



o''. Ox. dentifrons Fvl. eliam vicinus, sed iatior et bi'evior, cor- 

 pore antico fere opaco, alxloiuiue vix nitidulo, antennis paulo 

 brevioribus ; capite inulto laliore, froule subplana, alutacea, mar- 

 gine antico vix denticulato, sulco obliquo utrinque a tuberculo 

 antennario usque ad colluni paruni arcuato, lateribus fortius, 

 vertice subtilissime, strigellis, hoc fossulato sulcato, genis post 

 oculos dilalatis ; thorace latiore, minus profunde, sed latius trisul- 

 cato, lateribus latius impressis, angulis posticis paulo magis indi- 

 catis ; elytris fere brevioribus ; abdominis segmento 6° ventrali 

 iiiedio apice iinpresso et paruui emarginato ; 7° in patellain apice 

 triangulariter incisam producto. 9- A dentlfi-ons 9 prEcsertim 

 capite multo majore, transversim quadrato thoracisque sculptura 

 optime distinguenda. — Long., 2 3/4 mill. 



Guyane française sud : Rivière Lunier ; Oyapock, environs de 

 Saint-Georges (Geai/). 



O. Ghampioni *. 



9. Ox. sculpturato Grav. parum vicinus, major, Iatior, corpore 

 antico opaco, abdomine solo nitido, capite tlioraceque angustis, 

 depressis, in fundo alutaceis elytrisque longis, quadratis, prie- 

 sertim distinctus. Niger, ore elytrorumque disco maxima parte 

 piceis, pedibus rufo-testaceis. Antennœ elongatte, sat crassae, 

 articulo 3° 2" parum breviore, 4'^ 3° latiore, vix breviore, liaud 

 transverso, 5-10 multo latioribus, parum transversis, il" ovato- 

 acuminato, duobus prœcedentibus œquali. Caput suborbiculatum, 

 dense subtilissime strigellum, utrinque obsolète longitudinaliter 

 sulcatum, fronte tota alutacea, apice vix truncata, genis post oculos 

 médiocres parallelis, angulis posticis rotundatis. Thorax fortiter 

 transversus, subquadratus, postice parum angustatus, dense 

 fortius strigellus, late breviter trisulcatus, sulcis postice deletis, 

 medio solo alutaceo. impressionibus lateralibus latis, sat profundis, 

 angulis posticis obtusis. Elytra dense subtiliter strigella, in fundo 

 alutacea. Abdomen sat dense subtilissime punctulatum. çf latet. — 

 Long., 4 2/3 mill. 



Guatemala. 



Unique. 



