Geomctridac of the Argentine Ecjnchlic. 325 
scarcely one-half the length of forewing, in hotli sexes shortly 
bipectinate nearly to apex, the pectinations very short in the 9, 
apical segments nearly simple, with projecting scales and short 
ciliation. Thorax hairy beneath ; femora somewhat hairy; hind- 
tibia not dilated, in both sexes with four rather approximated spurs ; 
abdomen rather robust, not crested. Wings rather long and narrow, 
thickly but smoothly scaled, frenulum present. Forewing with 
costa nearly straight, apex not acute, distal margin entire, gently 
rounded, oblique; cell little over one-half, discocellulars incurved, 
SCi'2 long-stalked, their stalk anastomosing with C, SC^ later ap- 
pressed to SC^'^, but not anastomosing, SC^'^ from before apex of 
cell, R* and R^ curved, M* from rather near R^, from beyond 
two-thirds of cell. Hind wing with C anastomosing strongly with 
cell, SC^ connate with R^, medians as in forewing. 
Type of the genus ; Arizeki dnlcis, Prout, nov. sp. 
Apparently related to Hasodima, Butl., Erilophodes, 
Warr. and, Leueolithodes, Warr., but differing markedly in 
the strong anastomosis of the costal and subcostal of hind¬ 
wing, in various other points of venation, head-structure 
(with antenna), etc., so that the relationship can hardly be 
very close, 
217. Arizela dulcis (Prout), nov. sp. 
(Plate XLVIII, fig. 27.) 
. 28 mm. Face and vertex brown ; palpus brown, tipped with 
white; antennal shaft white above, brown spotted, brown beneath, pec¬ 
tinations brown. Thorax white, narrowdy brown anteriorly, legs white- 
and brown-banded. Abdomen whitish, with single dorsal and double 
ventral series of brown spots. Wings silky white, the markings 
brown, more or less mixed with grey. Forewing narrowly dark at 
base ; antemedian line before one-third, somewhat curved, tei’minat- 
ing abruptly below M, reappearing only as a large spot on SM^; post¬ 
median broad, waved, from three-fourths costa to two-thirds inner 
margin, parallel with termen, interrupted between R^ and R^; a 
costal blotch closely preceding antemedian, a second (grey-centred) 
in middle, abf5orbing the cell-spot ; an angulated mark from sub¬ 
median fold to inner margin, closely preceding postmedian line ; a 
few subterminal .spots; some dots in costal area and proximally to 
postmedian line ; fringe white, broadly chequered with brown from 
apex to M*, thence unicolorous. Hind wing with a few costal and 
terminal spots, the most con.spicuous being at termen between R* and 
R^ ; a very small discal spot, slightly above middle of discocellulars ; 
remnants of a postmedian band from costa to R^ (just distally to the 
