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III, On some of the Butterflies of Tobago. By G. B. 

 LoNGSTAFF, M.D., F.R.C.P., F.E.S. 



[Read November 6, 1907.] 



A GLANCE at the map shows that this island stands 

 outside the crescent of the Lesser Antilles, or Windward 

 Islands, about 20 miles to the north-east of Trinidad in 

 latitude 11° 15' N. The southernmost of the Windward 

 Islands proper, Grenada, is about 70 miles W.N.W. of 

 Tobago. It is therefore pretty obvious that, geographically 

 speaking, Tobago belongs to South America rather than to 

 the West Indies. The mountains of the north-east coast of 

 Venezuela, consisting for the most part of clay-slates and 

 schists believed to be of Silurian age, run by way of the 

 peninsula of Paria and the islets of the Bocas, along the 

 northern coast of Trinidad, and would appear to be 

 prolonged to the eastern half of Tobago. ' 



In area Tobago is about equal to the county of London, 

 comprising but 114 square miles, and therefore only about 

 three-fourths of the size of the Isle of Wight, and only 

 one-fifteenth of that of its neighbour. (Trinidad area, 1754 

 square miles = Lancashire.) The south-western portion 

 of the island, which is low and more or less flat, is formed 

 of coralline limestone, and is completely cultivated. The 

 central and north-eastern portions are hilly, rising to 

 2000 feet, and in large part covered with forest, some of it 

 virgin, but much of it of second growth, or "rastrajo." 

 The destruction of the forest is proceeding apace. 



My stay was limited to eight days, April 3-10, 1907, 

 of which, thanks to the hospitality of the Hon. H. L. 

 Thornton and Mr. G. H. Sworder, three were spent at 

 their estate, " Cocoa Wattie," the remainder near the 

 coast. 



We found the neighbourhood of Scarborough, the 

 capital, for some miles on either side of the town very 

 dry and parched, though we were told that there had been 

 "some nice showers at night" during March. The Trade- 

 wind blows very strongly along the coast, a dry, hot wind 

 which greatly increases the difficulties of the collector. 



Cocoa Wattie is a plantation near the middle of the 



TRANS. ENT. SOC. LOND. 1908. — PART I. (MAY) 



