COLIAS 1Y. 
rax yellow ; legs roseate ; palpi yellow, dark on upper side, roseate at extremity ; 
antennae and club roseate. 
Variety A, Upper side pale yellow with a very slight tinge of orange 
on disk of primaries ; sometimes wholly without orange and then uniform lemon- 
yellow ; the marginal borders also yery pale. (Fig. 7.) 
Female. Expands 1.7 to 2.1 inches. 
Upper surface yellow, the secondaries having a greenish tint ; disk of prima- 
ries slightly tinted with orange ; primaries have the marginal border broad, more 
or less excavated between the nervules and enclosing a macular yellow band, usu- 
ally complete, although the spot in median interspace is often but faint ; discal spot 
large, black, circular or ovate, and sometimes enclosing a central spot. 
Secondaries have the border abbreviated posteriorly and dilated towards outer 
angle, there enclosing two or three yellow spots of a band which disappears in the 
ground color ; discal spot as in male. 
Under side greenish-yellow except at base and on disk of primaries which are 
deep yellow ; discal spot of primaries large with a central white or yellow spot. 
The usual type from California and Texas. 
Variety A, $. Upper side of primaries bright orange and of secondaries 
pale orange, both wings much obscured by black scales ; macular band yellow. 
From Illinois. (Fig. 5.) 
Variety B, ?. Color above greenish-white, the secondaries with a faint yel- 
low tint ; beneath secondaries and apex of primaries more decidedly yellow ; 
marked as in the type. From California and Texas. 
Larva unknown. 
Found in the valley of the Mississippi from Nebraska and Illinois to Texas 
and westward to the Pacific, occupying much the same region as Eurytheme, but 
apparently less common and more local than that species. Also occasionally found 
in the Middle States and Canada. 
My attention was first called to the differences between the two species passing 
under the name of Eurytheme by Dr. Behr, in 1865. In a letter then received 
from him, he says, “These are two good species but have hitherto been considered 
as one. I am certain either of the two is different from the European Chrysotheme 
(of which species Dr. Boisduval had considered Eurytheme as probably a variety.) 
“It is easy enough to characterise the males, but as to the females, I am often at 
a loss myself ; and at the same time the two species are easy to recognize when on 
the wing.” And again in 1868, “I will- send you a pair of each of the two Colias. 
The difference is about the same as between Edusa and Myrmidone whose repre- 
