1870.] (hi the Normal Rainfall of Benga I. 243 



20. Carpophaga sylvatica, T i c k e 1 1. 



Abundant on Mount Harriet. Two specimens, male and female, 

 which I obtained, are exactly identical with birds which I have 

 shot in Manbhum and the Eajmahal hills, also with specimens in 

 the Indian Museum from Oachar, but they are quite distinct, as 

 has been already shewn,*' from the Nicobar pigeon. 



21. Demigretta concolor, Blyth? Herodias Andamanensis, 

 T y 1 1 e r. I only saw some young birds in confinement. The species 

 is said to be common. 



22. Onychoprion melanuciien, T em., P. Z. S., 1866, p. 556. 

 Common. Breeds on all the small detached rocky islands. 



[Note— on page 33, line 17 of this volume for (Tarsus) 3" read 2£".] 



On the Normal Bainfall of Bengal,! — by Henry F. Blan- 

 ford, F. G. S., Meteorological Reporter to the Government of 

 Bengal, 



[Received 27th May, 1870— read 6th July, 1870.] 

 The records of rainfall summarized in the following tables 

 relate, with a few exceptions, to the years 1848 — 1852 and 1860 — 

 1869. The former series have been extracted from the records of 

 the Board of Eevenue, and were kept by the Collectors under or- 

 ders of Government at the sudder stations of their respective 

 districts. In 1852, the charge of the rainfall registers was made 

 over to the District Medical officers, but the series from 1852 to 

 1859 are not available, having been placed in the hands of Mr. H # 

 von Schlagintweitfor the preparation of a summary of their 

 results. The later series have been principally taken from the 

 records of the Medical Department, and have been supplemented and 

 completed as far as possible from the returns received in theMeteoro- 

 logical office since its establishment in 1867. Some additional 

 data have been taken from miscellaneous sources, such as Dr. 

 Lamb's table in Yol. XXI of the Journal of the Asiatic Society, 

 Dr. Hooker's Himalayan Journals, &c, but these are compara- 

 tively few. 



* Vide antea, p. 32. 

 f For discussion upon this paper, see Proc. Asiat. Soc. for July 1870, p. 223-226. 



