1877.] ON NEW BUTTERFLIES. 61 
3. IrHOMIA ALCMENA. 
2. Exp. 2Lin. Allied to J. artena, Hew. (Ex. Butt. Ith. viii. f. 
48), and having the same neuration of the hind wing as the female of - 
that species, differing, however, in coloration, the dark margins 
of the wings being much broader and blacker; the black quadrate 
spot covering the base of the cell is placed at a more obtuse angle 
to the costa, the extracellular white spot following the same angle 
as the black one; near the distal ends of the median and radial 
interspaces are obsolete white spots not seen in I. artena, but not in- 
frequent in other Ithomie. The borders of the wings beneath are 
deep rufous; and at the apical angle of all are minute white spots. 
Hab. Guatemala; Choctum in Northern Vera Paz. Mus. nostr. 
4. IrHomIaA PUSIO. 
d. Exp. 1:7 in. Allied to I. lyra, Salv., and I. andronica, Hew., 
differing from the latter in the apex of the anterior wings having 
only a narrow black border, inside of which up to the extracellular 
white spot on the wing is diaphanous. In J. andronica white spots 
are enclosed in the dark apex of the wing. As in J. andronica, the 
dark spot covering the base of the cell is triangular and not subrect- 
angular as in J. lyra. The Q (exp. 1°85) resembles the male in 
colour, differing in the sexual divergence of the neuration usual in the 
Hymenitis section of Ithomia. 
Hab. Nicaragua, Chontales (Belt and Janson). Mus. nostr. 
We have long hesitated to describe this I¢homia, owing to its simi- 
larity to I. andronica; but having now seen a large number of speci- 
mens we consider its distinctness sufficiently apparent. 
5. ITHOMIA ZYGIA. 
d. Exp. 2:7 in. Anterior wings semitransparent dark brown; 
costa, outer and inner margins, a spot in middle of the cell, another 
at the extremity, and the median and discoidal branches black; a 
large spot near the end of the cell and two curved bands of spots 
crossing the apical half of the wing, the outermost following the 
curve of the margin, semitransparent yellow ; two small white spots 
near the apex ; posterior wings semitransparent, fulvous, yellower in 
the cell, and towards the apex a broad black margin enclosing three 
white spots, that at the apex being the smallest ; underside as above, 
the white marginal spots being more conspicuous. Female similar to 
the male as to the position of the markings, but darker, the white 
spots on the marginal border of the hind wings larger, central 
portion of hind wings, and middle of inner margin of fore wings, 
rich tawny. 
Hab. Chiriqui. Mus. nostr. et H. Druce. Allied to I. gonussa, 
Hew. 
SaTyRINZ. 
6. PrERELLA INCANESCENS. 
3. Exp. 2°8; 2 3°15. Allied to P. helvina, Hew. (Ex. Butt. 
Het. t. 1. f. 4), the colours being similarly distributed. ‘The black 
