COLIAS III. 
in West Virginia. Nor have I received it from Georgia, although large miscel- 
laneous collections have been sent me from that State. Mr. Reakirt has taken a 
single specimen at New Castle, Delaware. This is supposed to be the species form- 
erly mentioned by authors as Edusa, which it somewhat, but by no means closely, 
resembles. Boisduval & Leconte say of this Edusa, “ it is found in the Spring, but 
especially in the Autumn, in the fields in the vicinity of New York, less common 
than Philodice,” (a species which swarms in that region). Which of course is 
erroneous. The common and careless practice of pronouncing American insects 
identical with European has led to endless perplexity. No genus has suffered 
more in this respect than Colias, as the names Hyale, Palceno, Phicomone, JVastes, 
Edusa, and Chysotheme show. Excepting JVastes, which comes to us from Labra- 
dor, it is more than doubtful if one of these is American. 
It is difficult to say whether the present species is the one designated as Eury- 
theme by Dr. Boisduval or not, as his short and very general description would at- 
tach to almost any orange Colias whatever. But of late years this name has been 
so applied by American lepidopterists, the species I have separated as Keewaydin 
being regarded as a variety only. 
It is uncertain also what the brief mention of Amphidusa was intended to cover. 
This is described as “wholly like Edusa, having the border of the same form and 
breadth” only wanting the glandular space that characterises that species. Its lo- 
cality is given as the North of California, and we are told that it is “perhaps but a 
variety of the preceeding,” (Eurytheme.) No such form is known in any of the 
large Californian collections to which I have had access. 
