ClassiJiGation of the Ratelidae. 367 



only as aterrima, Dej., wliich occurs as a synonym of hevi- 

 coUiSj Waterh., from which it differs as far as possible. Very 

 near il/. aterrima is M. melanaria, Blanch., which was 

 included by Mr. Waterhouse, by mistake, in the synonymy 

 of M. tetradactyla, L. It may be distinguished from M. ater- 

 rima by the sculpture of the pygidium, that of the latter 

 having a smooth space upon the basal part, while in M. mela- 

 naria it is wholly striated. 



It may be mentioned here that, among many other omissions 

 and inaccuracies in the Catalogue referred to above, a number 

 of species of this and allied genera described by Kirsch in the 

 Berl. Ent. Zeit., 1870, have been entirely overlooked. 



The following new species of the genus Cnemida is remark- 

 able for its bright colouring in a genus of peculiarly sombre- 

 coloured Eutelidaj, and it is also worthy of notice for the 

 sexual difference in the colouring of the pygidium. It is the 

 Leucothyreus Leprieuri, Buquet, of Dejean's collection, accord- 

 ing to Reiche, but has of course no relationship with that 

 genus. Specimens in the British Museum were collected on 

 the Amazons by H. W. Bates. 



Cnemida Leprieuri, sp. n. 



Loete fulva, elytris exceptis metallico-uitens, capitis vertice, scutello 

 prothoraceque viridibus, hujus lateribua fulvis, elytri margine 

 lateral! post medium uigro-maculato, macula ad apicem linea 

 tenui producta ; capite irregulariter crebre punctato, prothorace 

 crebre punctato, disco sparsiu8, lateribua a medio antice valde 

 coDvergentibus, postice leviter divergeutibus ; elj"tris regulariter 

 punctato-striatis ; humeris fossulatis ; pygidio undique striolato. 



Long. 13 mm. 



(5 . Tarsorum anticorum ungue interno dilatato et diviso ; pygidio 

 viridi. 



2 . Unguibus omnibus simplicibus ; pygidio viridi. f ulvo-marginato. 



Jlab. Amazons, Ega, Pard. 



Although generically the same as the described species of 

 Cnemida, this will form a distinct section characterized by 

 the evenly sculptured upper surface and the protborax not 

 narrowed behind. 



The generic arrangement of the insects constituting Lacor- 

 daire's group of the Brachysternides requires amendment. 

 For the insects at j^resent known as Aulacopalpus a new 

 genus must be made, the type of that genus, Aulacopalpus 

 viridisj Guerin, being very different in structure. It is a 

 glabrous insect, clothed beneath with long hairs and not 



25* 



