348 
IDALUS. By Dr. A. Seitz. 
affinis. 
rufobasalis. 
cutcncita. 
neja. 
laurentia. 
fa -illucca. 
reticulata. 
rosea 
strujifera. 
rubens. 
irruptu. 
punctata. 
costaricen- 
sis. 
doncastcri. 
citrarias. 
panda mu. 
lutcscens. 
I. affinis Rothsch. (45 a) entirely resembles the preceding, but the violettish-brown parts of the 
forewing are more compact; the apical spot is curved like a crescent, the hind wings of a pure white. Colombia, 
Peru. In Peruvian specimens the brown apical spot is more slender than in the figured specimen from the Pacho. 
1. rufobasalis Rothsch. (45 a). From the Upper Amazon; here the brown apical spot is absent; other¬ 
wise like affinis. 
1. catenata Schs. (45 a). The large, purple-violet basal spot of the forewing is here so strongly inter¬ 
mixed with the yellow ground-colour that it is dispersed into single, small, brown clouds. Of the small, brown, 
punctiform spots in the yellow distal part of the forewing mostly the proximal one of those situate behind the 
transverse vein is larger and somewhat flown out. More to the south, Bolivia, South Brazil. 
I. neja Schs. (45 a) from Guiana. The whole forewing is intermixed with smaller and larger guttifonn 
spots; hindwing dark sooty, in the anal part lighter. 
I. laurentia Schs. (45 a). The small spots are more uniformly distributed over the whole forewing, 
so that the colouring approaches that of Phaeomolis lepida and Amaxia pcirdalis (45 f), but in laurentia there 
are instead of brown punctiform spots, distinctly marked small black rings. Guiana. 
I. favillacea Rothsch. (45 a) is marked almost exactly like catenata, but the forewings are paler, the 
spots much smaller, more diffuse, in some places almost entirely extinct ; the hindwings are dark sooty-grey. 
Surinam. 
1. reticulata Rothsch. (45 a). Ground-colour diaphanous whitish, the small dark spots dirty yellowish- 
grey, irregularly arranged like a net; in the basal and marginal parts of the forewing and at the middle of the 
border in the hindwing more densely congregated. Upper Amazon. 
I. rosea Schs. (45 b). Through the bright yellow forewings being densely covered with small red- 
brown drops there extend violettish-grey macular bands, particularly before the marginal part and before 
the middle. Venezuela and Colombia; the butterfly is common and widely distributed; small and very red 
specimens are found near Muzo; a large and beautifully variegated form in which the blackish spots of the 
forewings are smaller and darker, is before me from Pacho; owing to the veins distinctly streaked red I deno¬ 
minate it strigifera form. nov. (45 b). — The species varies very much. 
I. rubens Schs. (45 b). More slender and with narrower wings than rosea -, the small streak-spots between 
the red veins of the forewing are prominently black; hindwing hemochrome, with a white, oval male spot below 
the costa. Guiana. 
I. irrupt a Schs. (45 b). Instead of the black streak-spots there are between the red veins distinctly 
black small rings; the costa of the forewing is broader brown. Otherwise like rubens. Guiana. 
I. punctata Rothsch. (45 b). Forewing and thorax dark brown, sometimes more coarsely, sometimes 
more finely speckled yellowish-white; abdomen dark brown; hindwing brown, in the middle lighter or also 
quite whitish, only with dark speckled fringes. Strongly recalls certain Opharus- species, such as sestia, intermedia, 
flying in the same district. Peru. 
I. costaricensis Rothsch. (45 e) almost looks like a small, stunted form of affinis (45 a), but the 
3 small subapical spots forming there the dark apical crescent, are here so small that they do not touch each 
other. It was described as a Neaxia. Costa Rica. 
I. doncasteri Rothsch. (45 c). On the sulphureous forewing there is only a preinarginalrow of red-brown 
rings, with larger, brownish nebulous spots before the apex and proximal angle. Hindwings semi-diaphanous 
whitish-grey, anal part pink. The 2 has brownish dots instead of the small rings. Venezuela. 
1. citrarius Dgn. (45 c) is closely allied to doncasteri, but the <$ forewing has here a violettisli-brown 
oblique stripe bending round on the submedian fold and turning then towards the base of the wing. There 
usually also runs a spur-like continuation from the flaw towards the anal angle. The $ has only very fine, 
small black dots on the forewing, it is also without the rosy-red reflection exhibited in the £ on the dorsum 
of the abdomen and in the anal part of the hindwing. Colombia, Ecuador, and Bolivia. 
I. pandama Drc. (45 d) is as large as the preceding, the wings are likewise yellow, but by a rather 
uniform, dark striation it somewhat resembles a Halisidota, in which genus it was also described. The somewhat 
paler yellow hindwing shows towards the margin large, dull black internerval spots. Ecuador, Bolivia. 
I. lutescens Rothsch. (45 c). Body and wings unicolorously unmarked light yellow, only before the 
apex the costa is a little brownish. Peru. 
