Clg) 
‘relations which the life histories and the distribution of 
‘‘ the groups bear to their structure, then words are not 
*“ needed.” 
Now let us apply these excellent principles to the way in 
which Mr. Scudder has acted. 
He allows Gineis maccount to remain in the same genus 
with (!. semidea, though there are not perhaps in the whole 
genus two species more divergent in their general appearance, 
habits, and distribution than these ; maccouni representing a 
group characteristic of the Coniferous Forest of the Pacific 
coast, the other being typical of the most Arctic form of the 
genus, found on high mountain summits and ice-swept coasts. 
On the other hand, he makes out of the twelve species of 
Thecla found in his region six genera, of which four are said 
to be restricted to America, though it is evident that the 
author has little acquaintance with the genera of the 
Neotropical region. Amongst them IJncisalia is said to be 
confined to the United States, but closely allied to the 
European Callophrys, Billberg, of which he gives* our Thecla 
rubi as type; but does not mention Thecla dumetorum from 
California, which is so close to rubi that I cannot distin- 
guish them without the labels, and I find much variation in 
the characters by which Jncisalia is defined. Thus I am 
justified in saying that until Scudder shows us how to 
distinguish rubi from dumetorum and Callophrys from In- 
cisalia, the latter genus is not at present to be relied on 
for the study of distribution. 
Moore carries the same practice as far as Scudder, and 
though he attempts by analytical tables to characterise his 
so-called genera, they cannot be accepted on his authority 
alone, though, no doubt, some of them are based on good 
characters. In dealing with the Indian Satyrine, he has 
apparently, without reference to their allies in other parts of 
Asia, Africa, and Europe, sub-divided Ypthima, Satyrus, and 
others into many so-called genera bearing names such as 
Chazara, Crebeta, Hemadara, Kanetisa, Kolasa, Karanasa, 
Thymipa, etc., which being without meaning or sense, are 
very hard to remember. 
* Scudder, Gen. Butt. in Proc. Amer. Acad. Sci. Boston, 1875, p. 182. _ 
