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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 1s 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) 
