Descriptions of American Rhopalocera. 109 
Thyridia pallida, sp. n. 
T. xdesix affinis sed maculis omnibus fulvis multo pallidioribus 
semidiaphanis, plaga anticarum subapicali integra ut in 7. pythone, 
Feld., fascia transversa posticarum quoque integra sed angusta. 
Hab. BRAZIL, Matto Grosso. 
Mr. Herbert H. Smith’s collection from Chapada, 
Matto Grosso, contained a series of specimens of this 
Thyridia, which to some extent combine the characters 
of 7. edesia and T. pytho, a near ally of 7. psidii. The 
fulvous marks are paler and more transparent than in 
T. xdesia. The subapical spot of the primaries is entire, 
the lower portion not being separated by a black band 
from the rest. There is no definite black spot at the end 
of the cell, but a narrow black line passes through the 
end of the cell and joins the outer border. In the arrange- 
ment of the black markings of the wings this species 
closely follows T. pytho, but the colour of the semitrans- 
parent marks at once separates it from that species. 
Mechanitis equicoloides, sp. n. 
Alis anticis ad basin fulvis, ad apicem nigris, macula subapicali, 
fascia transversa irregulari discali flavis, macula rotunda in cellula 
altera inter ramos medianos primo et secundo nivra, vena submediana 
ad basin nigra, margine externo punctis sex albis notato ; posticis 
maculis duabus, una cellulari altera ultra eam, nigris fascia mediana 
valde irregulari fere maculosa quoque nigra margine externo nigro 
introrsum irregulari, punctis tribus albis includente : subtus ut supra 
punctis albis submarginalibus magis distinctis et magis numerosis (in 
anticis novem in posticis septem) ; posticis macula nigra ad basin 
cellule. 
Hab. EcuapDor, PERU. 
Dr. Staudinger has sent us from time to time several 
specimens of this species with the MS. name of JZ equi- 
coloides attached to them, a title we now adopt. They are 
from Sad Paulo, Olivencia and Yurimaguas. We have 
