4 
rSYCHF. 
I February 
cannot be obtained except by a long residence in the locality. faptain 
Robinson has sent me a partial list of the lepidoptera he collected here. It con- 
tains ten species, only two of which are represented in my lot, which brings out 
graphically the difficulty of obtaining a complete list of the butterflies and moths 
of any given locality in the tropics. 
Papilionid.f.. 
J^apilio thoas Linn. 
On Margarita I saw a butterfly apparently referable to this common species, 
although much below the average size, which I w'as unable to capture, owing to 
the nature of the vegetation. Captain Robinson writes me that he collected here 
an undescribed dwarf variety of this insect. 
Fif.ridak. 
While approaching the coast of Venezuela, I saw large numbers of Pieridse, 
flying over the water in small scattered groups. On the mountain sides above 
La Guaira I observed thousands of these insects, all moving, as were those over 
the water, tow'ard the east. On the way from La Guaira to Caracas, as well 
as on the mountain slopes in the vicinity of the latter city, they could be 
counted by hundreds, all, without exception, moving toward the east.* It seemed 
to be a migration, which w'as following the line of the coast, and going in the 
general direction whence came the trade wdnds.** 
I.epUiUs sp. 
.\n undescribable species of this genus was collected by Captain Robinson 
on the island, but subsequently lost. 
Pontia monuste Linn. 
The most abundant butterfly on Margarita; it occurs in the cocoanut groves, 
and especially in the patches of rank grass about El Valle. The majority of the 
e.xamples were in worn condition. In the early morning it is commonly found 
clinging to the grass-blades and leaves, where it is a conspicuous object. 
*Mr. W. E. Broadway, Curator of the Botanic Station at Grenada, B. W. 1 ., who lived for many years in Trinidad 
and who is an enthusiastic entomologist, tells me that /tf/us visits Trinidad every year from the mainland, 
coming over by hundreds, its movements being apparently comparable to those here described as observed among 
the PieridiE. 
•*For a more detailed account, see Canadian Entomologist. Aug., iqoj. p. 219. 
