€ levy) 
into elaborate statistics, which neither my time nor space 
would allow me to introduce here. But his general im- 
pression is, that when the forms of the higher Andes and 
extreme South are eliminated, no very marked divisions exist. 
He points out that the great features of the region as a 
whole, when contrasted with the rest of the world, are—the 
presence of peculiar subfamilies, such as Heliconine and 
Brassoline ; the enormous development of Ithomiine (a 
section of Danaiine) to the exclusion of Kuplaine; the 
large number of characteristic genera of Nymphaline and 
Morphine, as well as of Satyrine; the vast extent of 
Erycinida as compared with their poverty in other regions ; 
the presence of the highly peculiar Dismorphine (Pieridae), 
and wholly peculiar species of Papilionide ; the comparative 
poverty of true Lycwne, in place of which Thecla is vastly 
developed. And I would add the enormous development of 
Hesperiidae. 
I find in Watson’s paper on this family, above alluded to, 
that out of some two hundred genera recognized by him in 
the whole world, about half, including the whole of the sub- 
family Pyrrhopyyine and almost the whole of his first section 
of Hesperiine, are confined to the Neotropical, while about 
seventy occur in the Indian, and thirty only in the Ethiopian 
region, And at certain seasons and places, as I found at 
Orizaba in Mexico, in March, the species of Hesperiide out- 
number the species of all the other families together. 
Now let us turn to the Old World section of the Northern 
region, of which the butterflies are better known than those 
of any other region. Though some of the genera, such as 
Satyrus, Pararge, and Lycena, require subdivision to bring 
their generic value into accordance with those adopted in 
the Indian region, we have no great difficulty in reviewing 
them. 
I recognize four sub-divisions of this region :— 
1. The North American, which I have already dealt with. 
2. The Eurasian, which extends from Britain to N. E. 
Siberia, and coincides with that adopted by Sharpe. 
3. The Mediterraneo-Persic, or Mediterraneo-Asiatic of 
Sharpe. 
