Genls /|2G. — ONCIIORIIINL'S. 33fj 



fjia, nomine Listroderi inorbilloii desi^jUalum, Düui. Klig inisit a 

 typo hujusce spcciei in eo quitlcni discrepantia, ut i'ostruni cari- 

 nulis quinque vel Septem , pifficipue versus Lasin, distinctioribus 

 prseditum, in specimine altcro etiani arca longitudinalis, laevis 

 angustior, instar caiünula;, necnon tborax inlra lobum apicis dorsi 

 dislinctius semi-circulariter imprcssus; quum vero caetera ouinia 

 conveniunt, aberrationes ista3 ad specics separandas ansam vix 

 praibcnt. — Fiis. 



2. O. CRiERiTHORAX. [Chevrolcit.) — Suh-ovatus, niger: antennis tar- 

 sisfjue fusco-ferrugineis ; roslro villa dorsali integra, Icevi ; tiwracc 

 rüde vwioloso, anlice simiato-lohafo, iiitra apiccm sub-constricto ; 

 elylris inconcinne sidj-sulcaüs , inlerstUüs tiibcrculis setifcris se- 

 rialis. 



Palria : Cayenna. E IMusaeo Dom. Ciievrolat descriptus. 



Oncliorhino scabricolä paulo In'cvior, at vix angustior. Caput 

 parvum , rotundatum , nigrum , praeter foveolam in medio frontis 

 punctaque juxta oculos et in vertice sparsa, laevissiinum, politum; 

 oculi laterales, sub-depressi , nigro-brunnei; rostrum longitudine 

 fere tboracis, validum, arcuatum , basi elevatum, teres, apice 

 deplanato-dilatatuni , totum nigrum, seriato-scrobiculatum , in 

 cavitatibus ocbracco-pulverulcntum , interstitiis anguste sub-ca- 

 rinulatis, relicta arca dorsali lineari integra , la?vissima. Antennaj 

 medium tboracis baud attingentes , validiusculaj, fusco-ferrugi- 

 nese; clava ovata, griseo-bolosericea. Tborax latitudine baseos 

 baud brevior, apice profunde bi-sinuatus, lobo medio amplo, 

 leviter emarginato; intra apicem sub-constrictus, ponc stricturam 

 abrupte ampliatus, versus basin dein sub-linearis vel indistincte 

 modo angustatus, basi leviter bi-sinuatus, supra parum convexus, 

 undique rüde scrobiculatus, in cavitatibus ocbraceo-pulverulen- 

 tus, carinula dorsali vix distiiiguenda. Scutellum rotundatum, 

 heve, concolor. Elytra tborace plus dimidio latiora et fere triplo 

 iongiora, basi conjunctim sub-tri-sinuata, bumeris calloso-eleva- 

 tis, sub-angulatis; pone bumeros ultra medium lincaria, margine 

 inflexa, apice conjunctim sub-rotundata, supra modice conve.xa, 

 minus concinne sub-sulcata, sulcis versus latera simpliciter punc- 

 tatis , in doxso antico sub-scrobicuiatis, cavitatibus plus miuusvc 

 ochraceo-pulverulentis, inlerstitiis tuberculis remotis seriatis, dor- 

 salibus insignioribus, singulo scia albida [iraäditis. Corpus subtus 

 piceo-nigrum, profunde at remote punctatum. Pedes longiusculi, 

 piceo-nigri; femoribus remote cxcavato-punctatis, in cavitatibus 



