Classification of the Rutelid^e. 367 



only as aterrima, Dej., which occurs as a synonym of Ia;vi- 

 coUi's, Waterh., from which it differs as far as possible. Very 

 near M. aterrima is M. nielanaria, 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, iiave been entirely overlooked. 



The following new species of the genus Gnemida is remark- 

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

 coloured Hutelidffi, 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. 



Gnemida Leprieuri, sp. n. 



Loete fulva, elytris esceptis metallico-niteiis, capitis vertice, scutello 

 prothoraceque viridibus, hujus lateribus fulvis, elytri margine 

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

 tenui producta ; capita irregulariter crebre punctato, prothorace 

 crebre punctato, disco sparsius, lateribus a medio antice valde 

 convergentibus, postice leviter divergentibus ; elytris regulariter 

 punctato -striatis ; humeris fossulatis ; pygidio undique striolato. 



Long. 13 mm. 



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

 viridi. 



5 . Unguibus omnibus simplicibus ; pygidio viridi, f ulvo-marginato. 



llah. Amazons, Ega, Parji. 



Although generically the same as the described species of 

 Gnemida, this will form a distinct section characterized by 

 the evenly sculptured upper surface and the prothorax not 

 narrowed behind. 



The generic arrangement of the insects constituting Lacor- 

 daire's group of the Brachysternides requires amendment. 

 For the insects at present known as AulacopaJpus a new 

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

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

 glabrous insect, clothed beneath with long hairs and not 



25* 



