188 . ORCUS. 



Chilocorus platycephalus. 



Egiu8 platycepJudus, Muls. Spec. p. 464. 1. 



Cuba; surface opaque, finely alutaceous. This is a curious-look- 

 ing insect, but differs only from Chilocorus in the shape of the thorax 

 which is uniformly rounded behind, and the deeply emarginate 

 clypeus. 



Chilocoms transversus.* 



Chilocorus transversus, Mots. Bull. Muse. 39. 423 (1866). 



"Voisin de C. ru/oplayiatus, un peu plus large, tete rousse, 

 et la tache rouge a la base des elytres transversale, n'atteignant 

 pas la posticale." 



Chilocoms sanguinosus.* 



Chilocorus sanguinosus, Mots. Bull. Muse. 39. 423 (1866). 



"Tete et corselet d'uu brun roussatre, et but les elytres la 

 tache suturale est beaucoup plus allongee et a la base il y a une 

 troisieme tache noire au-dessus de la seconde, qui se trouve au 

 milieu un peu en arriere." India (Motsch.). 



Chilocoms rufoplagiatus.* 



Chilocorus rufoplagmtus, Mots. Bull. Mosc. 39. 423 (1866). 



"C. bipustulato octoduplo minor; orbicularis, valde convexus, 

 nitidus, niger, elytris rufescente marginatis, utrinque vitta lata 

 basali punctoque postico pedibusque runs." L. lilin. Nura Ellia, 

 Ceylon (Motsch.). 



Chilocoms sanguinolentus.* 



Chilocorus sanguinolentus, Mots. Bull. Mosc. t. 39. p. 422 

 (1866). 



"0. bipustulato quadruplo minor; orbiculatus convexus, mar- 

 ginatus, nitidus, antennis pedibusque rufis, elytris rubris, his 

 marginis, maculis 3 in medio (1| utrinque) transversini dispositis 

 nigris." Nura Ellia, Ceylon (Motsch.). 



Orcus. 



Muls. Spec. p. 467 (typ. j an thin us). 



This is divided into several subgenera by Mulsant : Priasus 

 (Australasias), Halmus (chalybeus), and 2 from America which I 

 have made distinct. The line along the base of the thorax seems 

 to be of importance, though it is much reduced in 0. chalybeus. 



Orcus artensis, sp. n. 



Ovate, almost hemispherical, not very convex ; alutaceous, 

 sparsely and pretty strongly punctate ; metallic greenish-black, 

 labium and emargination of clypeus rufous; thorax with the 

 anterior margin very narrowly rufous, sides strongly narrowed, 



