and Sj^ecies of Coleojitera. 33 



prothorace miilto latiora ; epipleura angiista, vix iuflecta. PeiJes 

 mediocres ; tihirp. arcuatae ; tarsi breves, liueares. JSh'Sosternum 

 leviter excavatum. Processus abdomino-intercoxalis triangularis. 



This remarkable form (the globose elytra, with its closely 

 applied scutellum, rising high above the prothorax) perhaps 

 finds its nearest ally in Sj^hcerotus, from which it may be 

 distinguished, inter alia, by its narrow intercoxal process and 

 short tarsi. So far as I can make out from the parts in situ, 

 the jugulum is broad, not showing much of the maxillae, 

 while the mentum is partially received into an emargination of 

 its anterior border. 



Diopethes arachnoides. 



D. breviter ovatus, vix nitidus, fuscus ; prothorace Icevigato ; elytris 

 valde elevatis, grosse seriatim puiictatis. Long. 2^ lin. 



Hob. Bahia. 



Shortly ovate, the comparatively small transverse prothorax 

 much narrower than the globular elytra, which are abruptly 

 and considerably elevated, togetlier with the scutellum, above 

 the former ; antenuse a little longer than the head, rufous- 

 brown, the first four joints not varying much in length, the 

 ninth and tenth very transverse, the last semicircular ; head 

 slightly punctured ; prothorax narrower at the base, the pro- 

 notura separated from the flanks by a very slightly raised 

 line ; each elytron with about eight rows of large punctures, 

 the intervals considerably raised ; claw-joint of all the tarsi 

 longer than the preceding togetlier. 



Immedia. 



Caput trausversum, paulo exsertum ; chjpeus breviter emarginatus, a 

 capita vix discretus ; lahrum transversum, integrum ; laJnmn 

 parvum, cordiforme. Antennce articuHs 9" et 10° transversis. Pro- 

 thorax transversus. Elytra rotundata, elevata ; epipleura latis- 

 sima. Metasternum brevissimum. Casteris ut in Cyrtosoma. 



In its rounded form the exponent of tliis genus is more 

 nearly allied to Cyrtosoma among Cnodalonina3 (to which 

 it must be referred on account of its sliort metasternum) than 

 to the elongate forms of the Helopinge. It may be the Cnodalon 

 minutitm of Dejean's catalogue, mentioned by Lacordaire when 

 treating of Cyrtosoma. 



Immedia occulta. 



I. rotundata, valde convcxa cuprea ; elytris purpuratis, punctatis, 

 punctis annulo viridi-metallico circumdatis. Long. 2 lin. 



Hab. Bahia. 

 Ann. & May. N. Hist. Ser. 5. Vol ix. 3 



