174 Mr. H, W. Bates on 



same members in Onitis, and totally different from 

 Phanwus, where these tibiae are narrow at the base, greatly 

 dilated towards the apex, with the outer edge strongly in- 

 curved, and not toothed. The difference in the form of the 

 anterior legs of the male would not strike an observer, 

 perhaps, as very remarkable in 0. Davus, but in a second 

 and new species I have received from Equador (where it 

 was captured by Mr. Buckley^s collector), it is striking 

 and conclusive. In this species the anterior tibiae are as 

 much elongate as in Bolhites onitoides, and, like that 

 species, have a tooth on their inner side about the 

 middle. 



I propose, then, to preserve, or rather (as no descrip- 

 tion has yet appeared) to institute, the genus Oruscatus, 

 with the following characters: — 



Oruscatus (Reiche, MS), nov. gen. 



Corpus oblongum, robustum. Caput in utroque sexu 

 transversim carinatum, genis ante oculos angulatis. An- 

 tennae clava distincte triphylla, hand infundibuliforme. 

 Pedes antici absque tarsis ; tibiis anticis quadridentatis, 

 S valde elongatis intus ciliatis ; tibiis intermediis 

 extus rectis, dentatis ; tarsis posterioribus quinque-articu- 

 latis, exunguiculatis. 



1. Oruscatus Davus. 



Phanceus Davus, Erichs. Consp. Ins. Coleop. Peru, 

 p. 107. 



Nigro-subcyaneus ; thorace passim vermiculato-rugoso ; 

 elytris striatis, interstitiis alternis clevatioribus. 



(^ . Tibiis anticis elongatis, intus ciliatis : thorace 

 antice leviter transversim carinato. 



9 . Thorace antice valde transversim carinato. 



Long. 7-10 lin. 



II ab. — Peru. 



2. Oruscatus opalescens, n. sp. 



Niger, supra nitore glauco-caeruleo indutus; clypeo 

 obtuse bidentato ; thorace medio la?vi, lateribus minute 

 granulatis ; elytris sulcatis. 



