BUTTERFLIES FROM THE CHIN HILLS. 685 



remark, with the exception of the following which here reach one 

 extreme of their range : — 



Anadehis, Callerebia, Zipoetes, Dilipa, Orthomiella, Fhengaris, 

 ZepJii/ms, Pieris^ Colias, Armandia^ Teinopalpus, FampJiila, Sehasto- 

 nyma, and Augiades do not occur to the south of the district, though 

 nearly all of them have been or almost certainly will be found 

 to occur at a similar latitude in the hills on the eastern frontier 

 of Burma. 



On the other hand Melanooyma, Prothoe, Taxila, Paragerydus^ 

 Drupadia, Eooxylides, Drina and Onryza have here reached their 

 northern limit, and are for the most part typical of the Malayan 

 subregion. 



The subgenus Myrtilus of Mycalesis is, as far as is known at 

 present, peculiar to the district. 



The general nature of the region under consideration is mountainous, 

 with the exception of the Upper Ohindwin and Yaw districts, and the 

 butterflies may be divided into three fairly well-marked groups : — 



(1) Species peculiar to low elevations. 



(2) Species peculiar to high elevations, 

 (o) Species common to both. 



The first group, which consists of species which are only rarely found 

 above 2,000 feet, contains 288 species, of which six are peculiar to this 

 district and four occur also in Eastern Burma, but do not occur to the 

 north or the south, of these ten, eight are distinctly Malayan in their 

 affinities, and the other two are Indian ; 116 species are wide-spread, 

 and are found from Tenasserim to the Western Himalayas, many rang- 

 ing also to peninsular India on the one hand and to the Malay Penin- 

 sula on the other. Of the remainder, 87 occur throughout the whole of 

 Burma and have been also recorded from Assam, and of these 68 also 

 range to the Eastern Himalayas ; 32 species do not occur to the south 

 of the present district though found at the same latitude in Eastern 

 Burma ; all these 32 species have also been recorded from Assam, and 

 most of them from the Eastern Himalayas, while seven range as far as 

 Southern India. The remaining 43 species of this group are peculiarly 

 Burmese and Malayan, and are found to the south as far as Tenasserim, 

 and in many cases as far as the Malay Peninsula ; none of them, how- 

 ever, occur to the north of the present district. 



