432 
[March 
with whitish. Palpi brown, terminal joint with a few whitish scales. 
Antennae with a whitish basal tuft; abdomen stout, exceeding the 
posterior wings ^ brown above and below. Legs brown, lighter shaded 
at the extremities of the tibial spurs and at the base of the tarsi. 
% Exp. 2 inches. 
ITab. Pennsylvania. Coll. Ent. Soc. Philad. 
This species presents some points of resemblance to the description 
of G. Umpida Gruen., but differs decidedly by the number and relative 
size and position of the white spots on the anterior wings. 
The list of North American species of Gortyna, as given by Dr. 
Morris, is susceptible of some alterations. Zese Harris, known to me 
only by the figure and description, does not appear to me to belong 
here. Leucostigma Harris, of which rutila Gruenee is a synonym, is 
our most common species and represents in our fauna the European 
flavago W. V. The name proposed by Harris for this species is open 
to the objection of being already used in the present family, but I 
cannot believe that this constitutes any sufficient reason for its rejec¬ 
tion. Marginidens Guenee, and Umpida Guenee, are as yet uniden¬ 
tified by me in nature. Guenee refers to them as possible varieties of 
his rutila^ but the descriptions seem to indicate distinct species. 
Mr. Walker, who evidently had the species before him, appears to 
have regarded marginidens as a doubtful variety of leucostigma. 
Nebris Guenee, and nitela Guenee, I have seen specimens of from 
the Eastern and Middle States; they are closely allied brown incon¬ 
spicuous species, the latter apparently merely differing from the former 
by the absence of the white ordinary spots which are replaced ‘by a 
blackish shade, observable when the specimen is held to the light. I 
have seen an individual the ornamentation of which appeared to me to 
unite these species, but have had no opportunity as yet of verifying the 
structural differences described by M. Guenee as separating them. 
The following is perhaps a more correct list of our species: 
? zese Harris, 
leucostigma Harris. 
rutila Guenee. 
marginidens Guenee. 
var? leucostigma. 
Umpida Guenee. 
cerussata Grote. 
nebris Guenee. 
nitela Guenee. 
