Insect Migralions in Tropical America. 151 



Yellow' BullcrJIies in Jamaica. 

 Mr. W. Butbii of the Board of Agriculture, Trinidad, 

 informs me that about the middle of December 1910 he 

 saw a large flight of yellow butterflies at Rockfort, Jamaica 

 (about three miles east of Kingston), flying in a direction 

 approximately north-west. He described the- migration 

 as a thin cloud, and estimated, from memory, that about 

 100 per minute would be passmg on a 100-yards front. 



Yelloiv Butterflies in Colowbia. 



Mr. Rudder, consulting engineer of the Usine St. 

 Madeline, Trinidad, informs me that in April 1900 he saw 

 a large flight of yellow butterflies in the district Darien, 

 Colombia, at an altitude of three or four thousand feet. 

 The butterflies were flying away from the Pacific towards 

 the east, and " one could get fifty in a net at one sweep." 

 The flight only, lasted five or ten minutes, during which 

 time the butterflies came down a certain valley, filling the 

 road through the forest. He could not say Avhether or not 

 they were also over the forest. The flight was a more or 

 less annual event for which they used to look out each 

 year. 



I have been unable to find the locality on a map, but 

 Mr. Rudder indicated it as somewhere towards the Panama 

 border and the Pacific. 



Canon A. Hombersley of Trinidad gave me the following 

 notes : " Travelling by river steamer down the Magdalene 

 from Giradot to Ambalema [about 100 miles west of 

 Bogota], towards the end of December 1914, for about six 

 hours I noticed, on the mud flats just above the water edge, 

 swarms of white and white-and-yellow butterflies- — densely 

 crowded together and quite still, so as to look like white 

 patches about a yard or more in diameter. 



" Leaving the boat, I travelled by train the same after- 

 noon to Mariquita; for many miles there is a mud road 

 running alongside the railway — this road was swarming 

 with the same butterflies, which settled in large densely 

 crowded patches wherever there was mud. 



" Travelling back over the same railway two or three 

 days after, on 31st December, I visited a cattle ranch and 

 walked some distance through the pasture along the mud 

 road. This was one continuous swarm of the same butter- 

 flies and one other variety (orange-red with black lines) 



