COLIAS 111. 



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 sjiecies form- 

 erly mentioned by authors as Edum, which it somewhat, but by no means closelv, 

 resembles. Boisduval & Leconte say oi i\ns Edusa, "it is found in the Sjiring, but 

 especially in the Autumn, in the fields in the vicinity of New York, less common 

 than Philodicc," (a species which swarms in that region). AVhieh of course is 

 erroneous. The common and careless jjractice of pronouncing American insects 

 identical with European has led to endless jjerplexity. No genus has suffered 

 more in this respect than Colias, as the names Hyale, Palmno, Phlcomone, JVastes, 

 Edusu, and Cltysotlicrnc show. ExcejJting Nastes, 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- 

 thcmc by Dr. Boisduval or not, as his short and very general description would at- 

 tach to almost an}' orange Colias whatever. But of late years this name has been 

 so applied by American lepidopterists, the species I have separated as Kccwaydin 

 being regarded as a variety only. 



It Ls 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 "pcrhaj)s but a 

 variety of the preceeding," {Eurythonc.) No such form is known in any of the 

 large Californian collections to which I have had access. 



