174 
MORPHO HELENOR. 
PLATE XXI. 
Godart Pap. Helenor, Cramer , PI. 86, fig. A, B ; Herbst. 
Pap. PI. 26, fig. 1, 2 ; Esjjer. Papillon's Exotiques, PI. 42, 
fig. 2. 
This affords an example of that section of the genus 
in which the upper w ings are more or less concave 
on the outer margin, and the inferior pair without 
any prolongation behind. They are almost exclu- 
sively South American. M. Helenor expands from 
four to five inches ; surface black, with a broad band 
of silvery blue or violet blue, extending from the 
middle of the anterior margin to the anal extremity ; 
sometimes rather narrow and well defined on the 
inner edge, at other times enlarged to within a short 
distance of the base of the wings ; at the anterior 
extremity of this band, on the costa, there is an 
oblique white patch, and beyond it, on the upper 
wings, a single row T of small white spots in the male, 
and two in the female. The secondary wings have 
an indistinct row of red crescents near the hinder 
margin, and the sinuosities in all the wings are 
white. The colour beneath is dark brown, the upper 
wings with three large ocelli having a white pupil 
surrounded with ferruginous and violet, the iris yel- 
