Mr. G. A. Boulenger on a new Gymnotine Fish. 305 
with the outer margin from the apex to the anal angle 
broadly bordered with red-carmine. The underside very 
similar to the upperside. he head, palpi, and collar bright 
carmine; the tips of the palpi, antenne, thorax, and legs 
black. 
Expanse 1# inch. 
Hab. Ecuador (Mus. Druce) . 
This species is allied to H pheenicides, Druce, from Mexico, 
but is quite distinct. 
Pericopis eugenia, sp. n. 
Female.— Primaries very similar to those of P. histrio, but 
without the yellow band crossing the wing near the apex and 
with the black apical 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 34 inches. 
Hab. Kast Peru (Mus. Druce). 
XXX.—Description of a new Gymnotine Fish of the 
Genus Sternopygus. By G. A. BouLencer, F.R.S. 
Sternopygus macrops. 
Eye without free lid, a little longer than the snout or the 
interocular space. Mouth very narrow; maxillary shorter 
than the diameter of the eye; upper jaw overlapping the 
lower; upper profile of head descending in a curve. Vent a 
little behind vertical of posterior border of eye. Pectoral fin 
as long as head minussnout. Anal with 175 rays, originating 
below middle of pectoral. Depth of body greater than length 
of head, 73 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. Unitorm pale brownish ; anal fin white. 
Total length 230 millim. 
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 River district, British Guiana, 
has been presented to the British Museum by Mr. J. J. 
Quelch. 
