HYPHORAIA; PLATYPREPIA. By Dr. A. Seitz. 
32 5 
P. juruana Btlr. (43 a). In the same way as bilinea (41 h) represents a small parallel form of burmeisteri, juruuna. 
juruana resembles a pygmean form of azollae : hindwings lighter, except a brown distal-marginal band. Abdomen 
above yellow. Jnrna River (Amazon). 
P. flavata Hmps. (41 i). Here the forewings are also lighter, except the brown marginal band, and flu rata. 
some small spots; colouring dull ochreous-yellow. The smallest species. Peru. 
P. bilinea Schs. (41 h). The marking is almost the same as in burmeisteri, i. e. the forewing shows bilinea. 
beside the slightly angled cell-end spot interrupted ante- and post-median nebulous lines; the latter are double. 
The $ abdomen is of a flesh-reddish colour except the base and apex. From Petropolis in South Brazil. 
V. Arctiinae, genuine tiger-moths. 
In this subdivision we find the typical characters of the whole family and in addition, as a merely 
external, though very conspicuous mark, a variety of contrasting colours, being most intensely developed. 
They are easily discerned from the pale, dull Polustra , the white Spilosoma, the narrow-winged Phaegopterinae, 
to all of which they are allied. In the neuration they are not homogeneous, for which reason of late a number 
of internally undoubtful Arctiids, such as the Callimorpha in Europe, the Platyprepia in America, have 
been eliminated. They were separated from the Arctiinae as Hypsidae (in a more recent sense), chiefly owing 
to the fusion of two veins on the hindwing, which proceeding, however, was not followed by many authors 
who added the Platyprepia to the Hyphoraia. But even if this genus is included, the number of American 
Arctianae is amazingly small; it only contains 5 species. Of the other American groups the genus Apantesis, 
both larvae and imagines, are the most closely allied; this genus, however, so exactly corresponds to our Euro¬ 
pean genera Orodemnias, Cletis and Euprepia, that we have inserted it above at the corresponding place. 
1. Genus: Hyphoraia Hbn. 
This group is allied to the Antarctia by the clumsy, stout structure, the heavy posteriorly thickened 
abdomen of the the fleece-like hairing, the long teeth of the doubly combed antennae, the broad wings 
and the fondness for dampness exhibited by the shaggily haired larvae; the Hyphoraia, however, pass their 
lives more under snow-covers than the Palustra living under the water. 
H. subnebulosa Dyar (42 b). A small species, most closely allied to the palearctic festiva, but the subnebu- 
forewings are less spotted light, and the hindwings are not honey-coloured, but dull ochreous grey with a broad 
dark marginal band. Known from Alasca, and a rarity like most of the Hyphoraia (except aulica). 
H. parthenos Harr. (= borealis Mschlr.) (42 a). A very large species, almost the size of a Pericallia par the non. 
matronula. Forewings thinly scaled, brown, spotted yellow, hindwings golden yellow, banded black. Easily 
distinguishable from matronula by the abdomen not being red, and the yellow spots on the forewing not only 
running along the costa. The butterfly is confined to Canada and the northern Atlantic States. Labrador, 
on the Upper Lake, on the Mackenzie River, everywhere rare; the specimens contained hitherto in the collections 
have mostly been taken at different places at long intervals. 
H. hyperboreus Curt. The modern authors agree in this form not being separable from alpina Quensel hyperbo- 
(= thulea Dalm.) which they, on the other hand, do not take to be separable from lapponica Thnbg. In Vol. II, 
we have figured both forms, lapponica and alpina (t. 17 e), and we refer to what has been said there (p. 95). 
hyperborea seems to be distributed over the whole of antarctic America. The species is so rare there, that it 
always costs about 3 or 4 dollars even in America. 
2. Genus: Platyprepia Dyar. 
The hindwings being in the Q of a bright golden yellow, with black ante- and postmeclian bands, strongly 
recall Pericallia matronula from Europe and Northern Asia, and Hypli. parthenos from North America. The 
genus, however, is distinguished by the uppermost rib of the hindwing being fused with the cell-wall to a rather 
thick cord (= Hypsidae Hmps.). Larva and imago, however, are otherwise allied to our Arctia. 
P. virginalis Bsd. (= ochracea Stretch ) (42 a). Forewings black with rows of white guttiform spots, viryinalis. 
hindwings of a bright yellow with black macular bands, in the $ sometimes with much black. — guttata Bsd. guttata. 
(42 a) has quite black hindwings except some honey-coloured guttiform, antemarginal spots, the abdomen 
is likewise above black and the white spots on the forewing stated by the author to be 18 are somewhat smaller. 
