784 
HELICONISA; ITHOMISA; EUDYARIA. By Dr. M. Drattdt. 
24. Genus: Helicoiiisa Wkr. 
It contains but one species very closely allied, on the whole, to the genus Dirphia from which it is 
chiefly distinguished by a very conspicuous sexual dimorphism. with a slender body, long bipectinated 
antennae and broad wings, whereas the $ is of a very clumsy structure with very feebly crenated antennae and 
narrow, incompletely developed wings. Neuration as in Dirphia , on the forewing 6 and 7 arise from the same 
place, or occasionally also on a short stalk. On both wings the cells are long with a strongly produced lower 
angle. Tibial epiphysis of % the length of the tibia, thicker than the tibia itself and sacciform. 
pagen- H. pagenstecheri Geyer (= impar Wkr., castora H.S., lancea Btlr.) (118 b, c). freshly emerged 
sicchcii. gcai p-py strewn with black hair-scales which are at once shed in flying, with ochreous veins, a horseshoe-like 
black marking at the cell-end and a black margin crossed by the yellow veins. Hindwing the same, but only 
with a small discal spot. Body yellowish-grey. $ with more reddish ochreous veins and between the veins 
more densely scaled black. Body above black, beneath deep reddish ochreous, above with similar rings and 
hair. Southern Brazil; Paraguay; Argentina. Zikan observed the GS flying between 9 a. m. and 3 p. m; the $ 
drops her eggs in lamps into the grass forming the food of the blackish-brown, black-spined larva with a red- 
brown head. The metamorphosis into a chestnut-red pupa takes place in a loose web on the ground between 
tufts of grass. 
25. Genus: Ithomisa Obth. 
Very similar to the preceding genus, but separated by shorter cells of the wings, the lower angle of 
which is not so far produced. On the fore wing 6 and 7 arise almost invariably separated; especially the hind wing 
is much broader with a rounder margin. The epiphysis on the anterior tibia is longer and attains entirely or 
almost the length of the tibia. Body of a stronger build, the $ with completely developed wings.- 
Type: kinkelini Oberth. 
kinkelini. I. kinkelini Oberth. (118 c). Variable; body varying between a whitish yellowish-grey and blackish- 
brown; fore wing in the basal half like the body, from yellowish-grey to red-brown, without a discal spot, in the 
distal half hyaline; the veins are coloured like the basal half, turning black distally and ending thickened in the 
variably broad black marginal area. Hindwing the same. The $ described by Berg is very much like that of 
the following species, but rays of the Isabel-coloured ground-colour remain between the broadly blackened 
veins without reaching the black margin. Argentina. 
eatherina. L catherma Schs. (= caina Zikan nec Ky.) (118 c, 119 b). Likewise a most variable species; body from 
greyish-brown to blackish-brown, anus more or less rusty red. Colour of wings varying between ivory white 
and yellowish-brown, in the basal portion mostly more red-brown, with thick black veins terminating like broad 
rays into the broad black margin; black discal spots may be present in both wings, or absent; the latter form 
impuncta. mostly comprising the light specimens may be named: imptlmcfa /. n. The $ is very much like the $ of 
Eudyaria venata, but it is larger with more pointed wings and between the veins there are always narrow more 
reddish rays visible terminating into the darkened margin. The egg which is light blue at first and then white, 
is deposited on Paepalanthus polyanthus. The larva with a habitus exactly like that of Automeris is green or 
black with branched thorns and pupates between leaves or in the grass without a web, the pupa being clumsy 
and dark red-brown. Southern Brazil. 
earilapha. L carilapha Schs., founded upon but one female with an expanse of 132 mm, is very similar to some 
d'd' of E. venata, and I am not sure whether it belongs to the genus Eudyaria or to this genus. Palpi black, 
body blackish-brown, with reddish-ochreous hair. Wings cinnamon-brown, in the distal half irregularly strewn 
with short brownish-black striae, fringes brownish-black; forewing with thick black veins, at the cross-vein an 
oblique white line, in the lower half proximad bordered with black. Hindwing in the cell and below it as far 
as the centre of the wing with reddish-brown hair, with fine black veins, a large round black discal spot. Uruguay 
(Montevideo). It may be related to D. zeta Berg (cf. p. 769). 
lepia. 1. lepta Dre. was not before me, and from the insufficient description it cannot be ascertained to which 
genus it belongs. Forewings and hindwing unicoloured dark brown, the darkest along the costal margin and 
apex of the forewing; veins somewhat darker. Under surface of forewing slightly dusted with grey. Body dark 
brown, antennae black. Expanse of wings: 5% inches. Paraguay. 
26. Genus: Eudyaria Btlr. 
Very similar to Ithomisa, merely separated by the somewhat obtuser shape of the wings and the stouter 
abdomen, especially in the $. In both wings the cross-vein is less oblique, in the forewing 5 is somewhat nearer 
to 6. Only 1 species: 
