of the Amazon Valley. . 191 
Melitece with wings lengthened in the manner of the Heliconiz. The 
‘species have a low and rather weak flight. 
11. Eresia Eunice, Hiibner, Samml. Ex. Schm. 
(2 =FPella, Hewits. Exot. Butt. Eres. f. 2.) 
A very common insect in thinned parts of the forest throughout 
the Amazons region. It flies near the ground in a floating and 
hovering manner, settling now and then on low plants. I have never 
seen it on the outside of the forest. The species varies much accord- 
ing to locality, following in the local variation of its colours the same 
rule as Mechanitis Polymnia, Heliconius Numata, and other fulvous- 
coloured butterflies; that is, having lighter belts -across the fore 
wings in the region near the Atlantic, and becoming more uniform 
in tint in the interior of the continent. The shape of the black 
streaks also varies. 
The following are the chief local varieties :— 
1. Typical form.—Fore wing with an oblique median blackish- 
brown belt, thickest along its costal half, and touching the outer 
border; on each side of this is an ochreous belt, which is palest 
in the 2. Disk of hind wing also paler than the ground-colour. 
Apical part of fore wing without pale spot in ¢, but having one 
in the 9 .—Abundant near Para, and showing little variation 
within the district. 
2. Tapajos form.—Median dark belt of fore wing broken into three 
spots in both sexes, namely, one close to the costa, a second in 
the middle, a third adherent to the outer border; on each side 
of the belt the wing is ochreous, paler in the 9. Disk of hind 
wing concolorous. Apical part of fore wing with a small pale 
streak in both sexes.—This form prevails in the dry woods of 
Santarem and the Tapajos. 
3. Upper Amazons form.—Median dark belt of fore wing in the ¢ 
reaching only halfway from the costa aeross the wing. Ground- 
colour of all wings uniform orange-tawny, including the spot in 
the apical part of the fore wing; in the 9 the median dark belt 
is of the same shape as in the typical form, and the belt exterior 
to this is of an ochreous hue. 
4, Eresia Olivencia.—In company with No. 3, at St. Paulo de 
Olivencia, there occurred individuals which diverge so much 
from the type as to merit a separate name. The ground-colour 
is clear orange-tawny. The median dark belt is well defined, 
but reaches little more than halfway across the wing ; the apical 
part having an orange-tawny blotch. The dark streak on the 
VOL. II. P 
