OF THE AMAZON VALL1.W 
535 
row of white spots on the fore wing is partly obsolete. Beneath, it wants (like N. Inachia) 
the yellow spot of the hind wing at the base of the costa. 
Fonnd, in company with N. Adelphe, on the banks of the Cupari. It is evidently a 1- ical 
modification of N. Inachia, although having a strikingly different app« i ranee through 
the change in its coloration. It is remarkable that the Cupari form of N. Ci/rianassa 
(N. Adelphe) should have changed so little, whilst N. Pyrois, the Cupari form of Inachia, 
is so considerably modified from its type. 
6. Napeogenes Pharo, Felder. 
Ithomia Pharo, Feld. Wien. Entomologische Monatsschr. 1862, p. 76. 
Ithomia Inachia, var., Hewitson, Exot. Butt. Ithomia, figs. 143, lit. 
Tabatinga, near the frontier of Peru, Upper Amazons. I believe, with Mr. Hewitson, 
that it is a variety of N. Inachia, but is a well-marked one, the product of a distinct area 
and constant in its differential characters; it merits, therefore, a separate name and 
mention. I did not meet with it in any other part of the Amazon region, except the 
locality mentioned above. Dr. Pelder has received it from the Upper Bio Negro. It is 
similar in colours to the N. sulphurina (the race of N. Inachia peculiar to S. I Brazil), 
but differs from it in the broader black borders and the much paler colour with semi- 
transparency of the discal areas of the wings. 
7. Napeogenes Ercilla, Hewitson. 
Ithomia Ercilla, Hewits. Exot. Butt. Ithomia, fig. 128. 
' Found only at Fonte Boa, on the Upper Amazons. It mimics very curiously in colours 
and markings a group of Ithomia! which are peculiar to the same part of the country, 
viz., I. JEUa, I. minima, I. Pnscilla, and /. Gnnilla. It agrees so nearly in all essential 
characters with XT. Inachia, notwithstanding the totally different coloration, that I thmk 
there can be no doubt it is another local form of that species. In support of this Mew, I 
would adduce that it is the only form of the JV. J««c/»«-group found in the locality, where 
or other might be expected to occur, from being found always in company 
with Ithomia where these latter exist abundantly. I found it flying amongst a crowd 
of the above-named species, within a limited area in the interior of the forest ; it was 
much rarer than the Ithomia, and quite undistinguisbablc from them on the wing. 
some one 
8. Napeogenes Ithra, Hewitson. 
74 
Agrees with Inachia in the colour of the body and antenna, but differs from it totally 
in the colours of the wings. It has a remarkable and evidently mimetic resemblance to 
Ithomia Cymo. Both are peculiar to the neighbourhood of Para-the Ithonna bemg very 
abundant, whilst N. Ithra is an extremely rare species. 
9. Napeogenes Corena, Hewitson. 
Ithomia Corena, Hewits. Exot. Butt. Ithomia, fig. 142. 
Found only at St. Paulo. Agrees with Inachia in the colour of the body and antenna, 
but is totally different in the coloration of the wings from that and all the allied species 
VOL. XXIII. 
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