Geometridae of the Argentine Bcpnhlie. 285 
Forewing with termen subcrenulate ; basal area with a few black 
spots; antemedian line black, bent or angled in cell, then oblique, 
but somewhat waved, to inner margin at little beyond one-fourth, 
sometimes quite indistinct; postmedian line black, from costa at 
about five-sixths, very strongly toothed outwards between SC® and 
Rl, then sinuate inwards, projecting again, but more bluntly, between 
E,-'* and M', thence strongly oblique inwards to submedian fold, 
finally slightly oblique or nearly perpendicular to inner margin at 
about one-half ; antemedian accompanied proximally by a diffuse 
brown or fuscous band (sometimes distinct, sometimes hardly darker 
than the ground-colour), postmedian, accompanied distally by a fine 
or thicker brown line ; cell-spot black, distinct; subterminal line 
strongly dentate, pale, sometimes quite ill-defined, sometimes 
rendered distinct by being filled up with darkish shading proxim¬ 
ally ; marginal line black, continuous, thickened more or less into 
spots between the veins. Hindwing with termen crenulate; ante¬ 
median of forewing and its accompanying proximal band continued 
as subbasal markings ; a black cell-spot; a generally indistinct 
median shade, usually nearer to post median than to cell-spot; a 
somewhat sinuous postmedian, but continuing approximately parallel 
with termen, accompanied distally by a brown line ; subterminal 
nearly as in forewing, sometimes still weaker ; marginal line con¬ 
tinuous, distinct, not thickened into spots between the veins. 
Underside glossy, withoirt markings, excepting a cell-spot on each 
wing. 
Aristides Villanueva, February 24, 1905 (W. M. Bayne), 
type (^) in coll. L. B. Front; Bakle, February 21, 1904, 
the only known $, in coll. L. B. Front; also six $s from 
La Faz and Mendoza, February and March, 1903-1905, in 
coll. L. B. Front et coll. A. F. Bayne: all collected by Mr. 
W. M. Bayne. 
Decidedly variable, not only in the strength of the 
markings, but even in their position, especially in the 
course of the postmedian of forewing; in this the sub¬ 
costal tooth is constant, but the sinuosities from here to 
inner margin seem alike in hardly two examples, varying 
from very slight to very deep, the outer line sometimes 
approaching close to the inner in submedian area, some¬ 
times keeping well away from it. Some examples have 
distinct pale markings distally to the postmedian, espe¬ 
cially a patch near the inner margin. 
Evidently quite closely related to jacintha, Butl., Tr. 
Ent. Soc. Bond., 1882, 414, from Chili, with wdiich it 
