186 L. de Niceville — Calcutta Butterflies. [Dec, 



laid down in section 16 of the Act. These coins should be also treated 

 in the manner above described. 



Order. — Ordered, that a copy of this Resolution be forwarded to 

 Local Governments and Administrations for information and guidance, 

 and that a copy be forwarded to the Director General of the Archaeologi- 

 cal Survey of India and the Revenue and Agricultural Department for 

 information, and to the Department of Finance for the issue of the 

 further necessary instructions ; to the Foreign Department for com- 

 munication, for their information and guidance, to all Political Officers. 



(True extract.) 

 A. MACKENZIE, 

 Secretary to the Government of India. 



The Secretary stated that the Council would be glad to receive the 

 names of any members interested in coins, who might wish to be entered 

 in the Register of Numismatists to be kept by the Mint authorities, and 

 referred to in para. 3. 



The following papers were read — 

 1. List of the Butterflies of Calcutta and its neighbourhood with notes on 

 habits, food-plants, 8fc. — By L. de Niceville. 



Mr. de Niceville said : " I do not propose to read through this list 

 of the Butterflies occurring in Calcutta and the neighbourhood num- 

 bering 158 species, as I fear it would not prove very interesting to the 

 majority of the members of the Society now present, but I would wish 

 to bring prominently to their notice the large amount of seasonal dimor- 

 phism that apparently takes place among seven of the commonest of the 

 species to be met with here and mentioned in the paper. In the box 

 which I will now pass round are exhibited the uppersides of fourteen 

 Butterflies which I consider to represent seven species, though until 

 now I believe all entomologists have considered them to be quite distinct. 

 During the last nearly nine years I have collected Butterflies in Calcutta, 

 and have always noted the months in which I met with the different 

 species. In this way I became aware that certain closely allied species 

 occurred at particular seasons only, and when these species were grouped 

 together according to the time of the year they were met with, it became 

 apparent that those which occur in the rains were strongly ocellated 

 forms, whilst those occurring at other seasons had the ocelli reduced to 

 mere rudiments, or were absent altogether. Why the wet season should 

 beget a generation of " eyed " Butterflies, and the dry season a genera- 

 tion of " eyeless" forms I am quite unable to offer a conjecture. 



