236 W. F. KIRBY, F.E.S., ON BUTTERFLIES, ETC.. 
found, I think, only in New Guinea and the Philippines ; there is 
nothing else among dragon-flies that it resembles in its denticulated 
wings, which is an exceedingly rare character in 0. donata. With 
reference to what Mr. Slater has said, it is difficult to tell whether 
it is the difference of climate or the difference of food plants that 
affects insects ; but Daphnis Neri: is found from the south of Europe 
to the south of Africa, as well as in the Hast Indies, and is only an 
occasional visitor with us. With regard to the interesting question 
asked by another speaker, I may say there is a disposition of 
butterflies north and south as well as east and west, both in Europe, 
Asia, and America, and we find many Arctic species re-appearing 
far to the south on Alpine summits. Perhaps that is less strictly 
so in Europe than in some other countries. For instance, there is 
an Arctic species, Colias Nastes (Boisd.), which is confined, in Europe 
and Asia, to ke extreme north; but there are southern repre- 
sentatives in the Himalayas. One of the most famous of the North 
American butterflies is Gneis Semidea (Say), which belongs to an 
almost exclusively Arctic genus. There are one or two Alpine or 
Steppe species, but they are exceptions; but @. Semidea is found in 
various localities in the extreme north of America, and then appears 
again on the summit of Mount Washington, and then again in a 
district to the west. I forget whether it is in Colorado, but you 
can see it referred to in the accounts given by Grote, Scudder, and 
other American writers. 
The meeting was then adjourned. 
