BUTTERFLIES OF PARAGUAY, AND LA PLATA. 197 
Ithomia hyalina, Fabr. A very elegant little species, with 
difficulty distinguished from the familiar West-Indian Ith.’ 
diaphana. It occurred, sparsely, in the woods near Asuncion, 
from Noy. to Jan. 
Tithorea Harmonia, Cr., var. Megara, Godt. Of this, which 
finds no place in Dr. Burmeister’s enumeration (op. cit.), a single 
specimen, in battered condition, was sent me from Corrientes, 
having been taken in Sept. In markings it agrees well with the 
variety figured in Doub. and Hew., pl. xiv. fig. 2: but the ground- 
colour is the dull sienna-brown of Cramer’s figure, not the fine 
scarlet which Mr. Hewitson gives to it. 
Mechanitis Elisa, Guer. Taken plentifully in woods, in the 
neighbourhood of Asuncion; from Novy. to March. 
M. Ethra, Godt. ‘This elegant species, which might readily 
be taken for a true Heliconia, is still more abundant than the 
preceding, in the woods of the whole of Paraguay, from the 
Parana northward, from Sept. to Jan. 
Heliconia Phillis, Fabr. <A beautiful, and a wide-spread 
butterfly, reaching even occasionally to Buenos Ayres, according 
to Dr. Burmeister. I have not yet received it from Corrientes ; 
but from Paraguay it is sent abundantly, where my friend finds it, 
from Sept. to March, in the whole region, chiefly in woods. 
Acrea Thalia, Linn.; A. Pellenea, Hiibn.; A. Anteas, D.& H.; 
A. Mamita, Burm. All these forms come to me from Corrientes 
and from Paraguay: the largest, and the most pronounced in 
colours, from the more northern region. They are reported to 
occur at the edges of the woods, in the spring and early summer 
months. But, after examination of a multitude of examples, I 
cannot resist the conclusion, that they are all varieties of one 
species, between which no fixed diagnostic lines can be drawn. 
NyYMPHALIDA. 
Colenis Phetusa, Linn. One example has been sent from 
Corrientes; many from Paraguay, where it is described as 
plentiful, from Nov. to Feb., particularly as the Tropic is 
approached. It affects open places. 
C. Julia, Faby. Locality and season as the preceding, but 
rather less abundant. It frequents the margins of woods rather 
more than its fellow. 
Agraulis Vanille, Linn. The extreme commonness of this 
