Geometridm of the Argentine Bepuhlie. 317 
as in amnicincta, the projection in cell not quite so deep ; post¬ 
median from about four-fifths costa to two-thirds inner margin, 
forming a slight projection between and R^, irregularly incurved 
between R® and submedian fold, and again at SM^; discal dot 
small, black, with a few dark scales behind it ; marginal line not 
appreciably darkened. Hindwing pale grey tinged with brownish, 
a tawny brown postmedian line beginning from a blackish spot on 
inner margin near tornus, but becoming faint, and almost dis¬ 
appearing after middle of wing ; a small fuscous cloud on termen 
from tornus to M^, and three blackish marginal spots, one between 
AH and AP, and one on either side of submedian fold. Underside 
uniform pale grey, tinged with brownish ; forewing with faint 
traces of darker postmedian line, which is pale-shaded distally, and 
of an elongate cell-spot; hindwing with a very weak, wavy post- 
median line, and a somewhat crescentic (or angulated), but rather 
indefinite, blackish cell-spot. 
Rodeo del Medio, May 20, 1904 (W. M. Bayne). Type 
in coll. L. B. Front. 
The above description has been drawn up from the type 
^ alone, because I felt uncertain whether a couple of ^s 
in coll. Br. Mus. belonged to the same species; but a 
further ^ received, during the progress of this work, from 
my kind correspondent Dr. E. Giacomelli, satisfies me 
that this is the case, and I am able to add that the species 
is evidently a variable one. If it be further conspecific 
with F. anmicincta, it is still more variable, for that has 
an altogether darker coloration, and a very much deeper 
sinus in the postmedian line of the forewing.* The ^s 
lack the tawny median area of the type, have the ante- 
median line of forewing rounded rather than angled in 
the cell, the postmedian rather straighter, the underside 
of the hindwing more strongly dusted with fuscous, and 
w'ith its discal spot better expressed. But my specimen 
from Dr. Giacomelli has a weakly tawny shade over the 
basal and median areas, darkening a little towards the 
postmedian line, and in one or two other respects serves 
to connect my ^ with the $s which I had previously seen. 
Accepting, then, all the four examples as belonging 
together, the following localities are to be added :— 
Gran Chaco, near Florenzia, October 1902 (S. R. 
* That members of the present genus can vary considerably in 
this latter particular is proved by P. Vignata, Warr.; but the 
divergence between amnicincta and norma is even more extreme. 
