228 
Louis B. Front on the 
smaller, with the postmedian line of both wings more 
dentate, than a topotype of alhidulata presented to the 
British Museum by Mr. Schaus. Except in the presence 
of the black dots on the post median line, or at least 
of the characteristic one on IF, they come very close to 
certain forms of A. cclipes, described below. 
40. Acidalia qnicornata (Warren). 
Craspedia nnicornata, Warren, Nov. Zool., vii, 151 (1900). 
Tucuman and Los Vasquez, in coll. Dognin. 
Warren’s types were from S.E. Brazil. I have not studied 
M. Dognin’s specimens, but they have no doubt been 
determined by Mr. Warren. 
41. Acidalia eclipes (Front), nov. sp. (Flate XLVIII, 
fig. 18.) 
^ 9- 18-20 mm. Face dark fuscous; vertex whitish ; {^antenna 
moderately ciliated. Wings whitish, faintly tinged with ochreous, 
sparsely sprinkled with minute blackish fuscous dots (discernible 
only on magnification), and traversed by weak grey-brown lines and 
shades ; an antemedian line, bent in cell; a subdentate postmedian, 
parallel with termen, but making a moderate angle distally on ; 
an oblique median shade, somewhat angled on R* ; some indistinct 
shading on either side of the sinuous pale subterminal ; discal dot 
small, black ; a series of small black terminal dots, or short dashes, 
between the veins. Hindwing similar, without the antemedian 
line; median shade passing on the proximal side of the cell-spot, 
sometimes nearly straight, but usually somewhat bent round it. 
Underside whitish, the markings usually weak excepting the post¬ 
median line, which is rather sharjj, and the terminal dots, which are 
as above ; discal dots sometimes well expressed. 
Buenos Aires, not uncommon ' from January to early 
March (A. F. Bayne), the type ($, February 27, 1903), and 
others (both sexes) in coll. L. B. Frout—also in coll. A. F. 
Bayne ; ? Gran Chaco, in coll. Br. Mus. 
Somewhat variable. The discal dots are usually very 
distinct, but I have one specimen in which they are obso¬ 
lescent on the fore- and minute on the hindwing. In 
another, the wings are more strongly powdered with dark 
atoms, and the central shade is more strongly developed, 
so that the whole insect appears darker. 
A thoroughly typical Acidalia in all points of structure, 
