316 
r. Louis B. Prout on the 
margin, dark-shaded proximally ; discal spot minute, black ; mar¬ 
ginal line fine, blackish, slightly interrupted. Hindwing rather 
strongly crenulate, with the longest projection at ; paler than 
forewing, except inner margin, which is strongly dark shaded, the 
dusting concentrating into a small irregular blotch close to tornus ; 
a postmedian line beginning on inner margin near tornus, but 
becoming faint, and almost disappearing after middle of wing ; 
traces of a fine black marginal line, a series of distinct black dots 
placed on it between the veins, those between and and on 
either side of the submedian fold the strongest. Underside of fore¬ 
wing paler than upper, but somewhat darkened and more dusted 
along costa and in apical region; an elongate blackish discal spot, 
and the beginning of a tine dark postmedian line from costa. 
Underside of hind wing rather strongly dark-speckled, with large 
black cell-spot, which is nearly bisected with pale at the fold 
(position of R^), and with a strongly sinuate fuscous postmedian 
line. 
Buenos Aires, October 10, 1905 (A. F. Bayne). Type 
in coll. L. B. Prout. A second Mendoza, March 1908, 
is clearly of the same species, though rather worn, and 
with the median area of forewing considerably narrower— 
antemedian making, from costa, a stronger bend towards 
postmedian, and thenceforward further from base, while 
the postmedian bends slightly more basad towards inner 
margin. I also saw a specimen of the species in coll. 
Rothschild some years ago—I think from Tucuman— 
bearing the MS. name of Pero amnicincta, Warr., which I 
have adopted. I have seen almost all the described species 
of this extensive genus, and have studied the descriptions 
of the few others, and cannot find any agreeing with the 
present insect or the following, which may conceivably be 
a form of it. 
208 . Pero norma (Prout), nov. sp. 
(Plate XLVIII, fig. 1.) 
Peo'o {Azelina) no^’ma, Prout, nov. sp. 
33 mm. Head and body nearly unicolorous light brownish 
grey, the face in part and the palpus darker. Antenna as in 
P. amnicincta. Forewing divided into three contrasted areas by 
the transverse lines, the basal and terminal greyish-fawn colour, 
sprinkled with blackish, the median tawny, very weakly sprinkled 
with darker, and darker shaded distally ; antemedian line almost 
