Geometridae of the Argentine Re^uhlic. 
217 
24. Ptychopoda spernata (Walker). 
Acidalia spernata, Walker, List Lep. Ins., xxii, 730 (1861) 
(nec var. /I). 
Acidalia hotydaria, Walker, List Lep. Ins., xxvi, 1599 (1862) 
(nov. syn.). 
Ptychopoda limitata, Warren, Nov. Zool, iv, 443 (1897) 
(nov. syn.). 
Anteois pyginaeata, Warren, Nov. Zool., viii, 453 (1901) 
(nov. syn.). 
Goya (Corrientes) and Los Vasquez (Tucuman), in coll. 
Br. Mus.; Tucuman, in coll. Dognin; Buenos Aires, not 
rare (A. F. Bayne).* 
I do not think the synonymy of this species, as given 
above, has heretofore been published, though I called Mr. 
Warren’s attention to it a long time ago. Walker’s type, 
from Venezuela, is in very poor condition, but the species 
varies little, and is very easily recognizable. His type of 
hotydaria, from the same collection (Dyson’s), is better, 
and would help to remove uncertainties of determination, 
if such existed. 
This species is to be regarded, so far as present knowledge 
extends, as a typical Ptychopoda, though the areole (which 
is simple) is rather narrow, and in one specimen which 1 
have examined, but not denuded, is almost certainly “ open ” 
distally ; i.e. SC^ does not anastomose with, though closely 
approaching, the stalk of the other four subcostals. This 
peculiarity occasionally occurs in the North American 
species genimata. Pack, (an anomalous species, but nearer 
to Ptychopoda than to Acidalia = Leptomeris, in which 
Hulst places it), and deniissaria, Hiib. = ferrugcda. Pack.; 
see Packard’s “ Monograph,” pi. iii, fig. 16, and Explanation 
of pi. iii, fig. 17 (“PJoisferruginata ”). With the last-named, 
spernata is closely related—perhaps a geographical race 
rather than a species. 
25. Ptychopoda asceta (Prout), nov. sp. 
9 . 12 mm. Head and thorax bone-colour, slightly tinged with 
reddish ; abdomen above deep purple fuscous, except anal end, 
beneath pale. Forewing bone-colour, slightly tinged with reddi.sh, 
* About Buenos Aires, Pt. spernata occurs from November to 
February. It probably has a wide distribution in eastern South 
America. 
