Mr. G. A. Boulenger on a new Gymnotine Fish. 305 



with the outer niarf^iii from the apex to the anal angle 

 broailly bordered with rod-carmine. The underside very 

 similar to the npperside. The head, palpi, and collar bright 

 carmine; the tips of the palpi, antennie, thorax, and legs 

 black. 



Kxpan<?e \\ incli. 



Hab. Ecuatlor (J/m.s. Druce). 



This species is allied to E j'^oenicides^ Druce, from Mexico, 

 but is quite distinct. 



Pericopis eiigenia, sp. n. 



Fevvile. — Primaries very similar to those of P. hi'strw, but 

 without the yellow band crossing the wing near the apex and 

 with the black a))ical margin very much narrower; the 

 marginal spots smaller and duller in colour : the secondaries 

 very much the same as those of P. histrio, but darker in 

 colour. 



Expanse ?>\ inches. 



Hab. East Peru (J/hs. Druce). 



XXX. — Description of a new Gymnotine Fish of the 

 Genus Sternopygus. By G. A. Boulenger, F.R.S. 



Sternopygus macrops. 



Eye without free lid, a little longer than the snout or the 

 interocular space. ]\louth very narrow ; maxillary shorter 

 than the diameter of the eye ; upper jaw overlapping the 

 lower ; ujjper profile of head descending in a curve. Vent a 

 little behind vertical of posterior border of eye. Pectoral fin 

 as long as head minus snout. Anal with 175 rays, originating 

 below middle of pectoral. Depth of body greater than length 

 of head, 1\ times in length to end of anal. Tail produced 

 beyond the anal in a very long appendage terminating fili- 

 form and measuring half total length without head. Scales 

 very small. Uniform pale brownish ; anal tin white. 



Total length 230 niillim. 



This new species is easily distinguished from all others by 

 its much larger eye. A single specimen, collected by Rose 

 Lloyd in the higher Polaro Eiver district, British Guiana, 

 has been presented to the British Museum by Mr. J. J. 

 Quelch. 



