Mr. C. B. Williams' Records of Insect Mi(/ralions. 147 



Uraniadae. 



Cydamon leilus. Trinidad, 18(58, 1878, 1891, 1899, 1901, 

 1912, 1917, 1918, 1919. 

 British Guiana, 1912. 

 Barbados, 1901, 1905, 1906, 1912, 1915. 

 Venezuela, 1917. 

 Costa Kica, 1917. 



Tabanidae. 



DIPTEEA. 



Venezuela to Trinidad. 



Yellow Btdlerjlies off' the Coast of Dutch Guiana. 

 Mr. luce of Port of Spaiu, Trinidad, informs me that 

 about three years ago (1915 or 1916), about the month of 

 July, he saw thousands of yellow l3utterflies flying in a 

 northerly direction past his steamer, which was about 

 twenty miles off the coast of Dutch Guiana (Surinam), 

 between the river Surinam and the river Nikeri, and 

 well out of sight of land. There is no land in the direction 

 in which the butterflies were flying. 



Yellow Butterflies in British Guiana. 



Dr. Barnes, who was for many years a resident of Berbice, 

 British Guiana, tells me that migrations of yellow butter- 

 flies were a regular event there. The butterflies always 

 flew along the coast from south-east to north-west, which 

 is across the prevailing wind. 



This is an additional locality to those given in my 

 previous paper {loc. cit., 1917), but fits hi with my general 

 conclusions as to the two main directions of flight. 



Yellow Butterflies in Trinidad. 

 1918. 



Since the publication of my account of the migration of 

 Catopsilia statira in Truiidad in October 1918 {loc. cit., 

 1919, p. 76) two fui-ther records have been obtained, which 

 may be placed here for reference. 



They were seen abundantly on several days during the 

 migration flying towards the west in Tucker Valley near 

 Macqueripe (Brash). [Macc(ueripe is on the north coast, 

 north-west of Port of Spahi.] They were also seen passing 



