OF THE AMAZON VALLEY 
541 
am inclined to think that all three are modifications of one and the same species. They 
may have arisen in separate localities, and have been afterwards brought hy altered 
distribution into contact; bnt it is not necessary to suppose this, as the Ithomice alu ay- 
pair with their exact counterparts, so that separation is probably not requisite to aid the 
segregation of races, when the variations have once arisen. 
The flocks of Butterflies, all of the same colour, and undistinguishable from one another 
when on the wing, which fly together in the same dry hollows of the forest at FonteBoa, 
comprise, besides the three preceding species, also a fourth Ithomia (I. JElia, belonging 
to a different section of the genus) and Napeogenes Ercilla. A Zcptt'/is (PI. LV. 
fig. 6), coloured in the same way, occurs in company with /. lU'uiissa, at Ega; and 
an Ithomeis* (J. aurantiaca, belonging to the widely different family Erycinifo) Hies 
* Ithomeis, nov. gen. (Family Erycinid^e). 
Allied to Lymnas and Pheles. Facies of Ithomia, having similar elongated fore wings ami whitish spots near the 
apex, imitating the transparent ones usual in the species of that genus. 
Head clothed with even, soft hair-scales : palpi extremely short, thick, thinly and smoothly clad with scales. 
Antennse moderately slender, elongate, not pale-ringed ; thickened towards the apex into an elongate, slender, com- 
pressed cluh. Fore wing elongate, apex more or less rounded : suhcostal and median nervures straight ; the former two- 
hranched, emitting its first branch just before, its second much beyond, the end of the cell : upper disco-cellular very 
short ; middle disco-cellular much longer, transverse ; lower disco- cellular slanting outwards, nearly perfectly tubular, 
joining the median beyond its second branch. Hind wing suboval j upper radial appearing as a continuation of the 
erse 
disco-cellular in the same relative position as in the fore wing. Legs thinly clad with scales, stout ; fore legs of the tf 
$ 
mnos 
Zeonia, Themone, and the allied genera. Its nearest relationship is with Pheles, from which it differs m the second 
subcostal branch of the fore wing being emitted after, instead of before, the end of the cell. The species of Pheles 
have somewhat the aspect of Ithomice and Stalachtes, but those of Ithomeis have a much closer resemblance to those 
genera 
1. Ithomeis aurantiaca, n. sp. 
6 • Expanse 1" 9"'. Fore wing : above, black , a long triangular spot at the base of the cell a smaller one just 
after the cell, a rounded one between the 1st and 2nd median branches, and a belt of three similar spots across the 
wing, between the radials and the 2nd and 3rd median branches, whitish ; the costal margin at the base, a large spot 
between the median and postmedian nervures, and a narrow, somewhat regular, snbmargmal band begmnmg on the 
costa, running parallel to the outer margin, arched, and reaching the hind margin, orange. Beneath, the same 
Hing «,ingV above, orange, the whole margin narrowly, and a large triangular spot on the basal part of the disk, 
black. Beneath, the same, except that there are two white spots at the base of the wing. 
Antenna- black Bodv black ; forehead silvery white ; abdomen beneath orange. 
Fot d at Catra, Ween Ega and Fonte Boaf in company with M- Mia, which » very much resembled on 
the wing 
2. Ithomeis Stalachtina, n. sp 
rf Expanse 1" 8'" Fore wing: above, black; the costal and hind margins near the base slightly tinged with 
tf. expanse 1 8. f ore wing, u , » between the 1st and 2nd median branches, 
tawny orange , a long stripe within the baae, a ^»>«ond the «1 ; » ^hetween t », P ^ 
and a short maenlar erossbelt, placed rather more than halfway between tne cen .an i , 
same, except that the tawny-orange marks near the base appear as drsttnet s.npes, and that there n M ««. 
obscure tawny belt parallel to the outer margin. 
J r . . . « i ^ cfn'no nponnc at the base, 
runs along the abdominal margin, 
bent g bZre Z^Z^ *£ 3S*5 ^ <° «" *«' *~ * ^"sT ^ 
middle of the costal margin. Beneath, the same, except that there are two whtte spots at the base. 
Body and antenu<e black ; forehead silvery white ; abdomen beneath orange. 
