OF THE AMAZON VALLEY. 
637 
in the same country. Mr. Hewitson, in the text, has called attention to the close 
resemblance, stating that he had been inclined to refer them to the same species. 
3. N. Apl t lia, Hewits. 1. c. Ithomia, fig. 127. 
New Granada. This species, different in style of coloration from any ITcliconide found 
in the Amazon region, affords another instance of the strange adaptive resemblances 
existing in this genus. It mimics a small group of Geratinie which are also peculiar to 
New Granada, namely, C. (or Melincea ?) Villula (Hewits. Exot. Butt. ItJiomia, fig. 126) 
and C. Cceno (ib. fig. 84). 
4. N. Xanthone, n. sp. 
<? . Expanse 2". Belongs to our first section, and is probably another local form of 
iV. Inachia. Wings elongate-narrow. Fore wing : above, with the black borders and 
crossbelt arranged as in N. Inachia, except that the crossbelt is much more obi i. pie, com- 
mencing nearer the base of the wing ; basal area opake bright fulvous ; the crossbelt very 
broad on the costa, then narrower, but continuing of equal breadth from the cell to the 
outer margin; subapical spot oblong-oval, bright clear yellow ; outer margin spotless. 
Beneath, the same, except that there is a submarginal row of seven wliite spots. 
Hind wing : above, with outer margin from before the end of the costa to the anal angle 
broadly black, enclosing an orange-coloured stripe; discal area bright clear yellow. 
Beneath, the same, except that the basal part of the costa is yellow, and that there is a 
black stripe along the subcostal nervure, and a submarginal row of six white spots. 
Body dark grey ; collar and wing-lappets orange-coloured. Antennas black. 
Bahia and S. E. Brazil. It somewhat resembles in its general colours Mechanic 
Nescea, a prolific species peculiar also to the same part of Brazil. 
5. N. STTLPHUEINA, nob. Ithomia Inachia, var., Hewits. Exot. Butt. Ithomia, fig. 67. 
Bahia. 
Genus Ithomia, Boubleday. 
Doubld. and Hewits. Gen. Diurn. Lep. p. 122. 
median nervure, and 
I propose to limit this genus to those speeies in which the hind-wing disco-cellular 
nervule is placed so as to form a right or acute angle with the -• -~ - - - 
directed across the wing (instead of towards the apex) in both sexes. The head and palm 
are constructed precisely as in Ceratinia, Sais, Mechanilis, and Xapeogenes. The antenn* 
are long, and th ickened towards the tips ; sometimes they are excessively elongated and 
filiform! Even when thus limited, the genus contains a considerable diversity of forms, 
constituting groups which perhaps hare an equal right with 0erut.ua and Mpeogenes to 
be called genera. The chief groups are the three following : 
1. Ithomia proper 
The hind-wing lower radial is visible on the disk, and terminates on the fond margin, 
the median branches not being widely separated. There is a long middle <^War 
nervule which is directed obliquely outwards. The arrangement of the upper radial and 
4c2 
