ll 
(Ist) 
of the Rocky Mountains, one extending into Mexico, 
and the other, A. lycidas, to the southern portions of New 
England. Of the remaining species, A. liliana ranges from 
the Naga Hills to Yunnan, A. bifasciatus is found in North 
China, and three or four more nearly allied species in 
Central and Western China. 
This is the more remarkable, because of the extraordinary 
resemblance between the Lepidoptera of the Rocky Mountains 
of Colorado, Montana, and Alberta, and those of Northern 
Europe and the Alps. This resemblance was, *I think, first 
pointed out by Packard in a paper on the Geographical 
Distribution of the Moths of Colorado ;* but it is not there 
shown with anything lke the force that later and _ better 
knowledge of the high-level insects of the Rocky Mountains 
afford. 
I have had personal experience of this in two collecting 
trips to the Pacific and Rocky Mountain States, and was 
astonished at the number of butterflies, identical with or very 
closely allied to those of Hurope, which occur at high levels in 
Colorado and Alberta, and the small number of species which 
belong to non-Huropean genera. I have not yet been able to 
bring together the results of these journeys, as I hope to do 
when I have explored the higher mountains of Montana, 
Wyoming, and Idaho; but I am convinced that many of 
the species which have been separated by W. H. Edwards 
and others are identical with Kuropean forms. 
A few of the most striking examples are shown among the 
specimens I have brought here, and I would call special 
attention to Lrebia magdalena, lL. tyndarus, FE. epipsodea, FE. 
sophia, and Cenonympha typhon among the Satyride; 
Argynnis chariclea and A. freya among the Nymphalide; 
Papilio machaon amongst the Papilionide ; Colias hecla, C. 
nastes, Anthocharis ausonides among the Pieridze, and Pamphila 
palamon and Hesperia centauree among the Hesperiidae. 
There can be no doubt that the subdivisions proposed by 
Dr. Bowdler Sharpe, in his admirable paper on the ‘ Zoo- 
Geographical Areas of the World, illustrating the distribution 
* Ann. Rep. U.S. Geological Survey for 18738, p. 543, et seq. 
