406 Timehri. 
Other lepidopterous insects I noticed flying across from Wakenaam 
to Hog Island and Great Troolie Island were Pontia monuste, a goodly 
number, Cydimon leilus, a fair number, Anosia plexippus, a few, and 
one that appeared to be Junonia cenia, a very few. In most cases the 
insects did not fly very high above the water surface, and the stronger 
the wind the closer down they kept. On the return journey I observed 
Cydimon leilus crossing the wide stretch, between Leguan and Tuschen, 
about two miles, perhaps. 
Anosia plexippus is also known to migrate in big swarms like 
Callidryas ewbule. 
The habits of a butterfly may vary in some respects in different 
localities according to circumstances. Junonia eenia may be instanced. 
On the coastlands it generally keeps to wooded places. It seldom 
ventures into the open or far from its shelter. One of its favourite 
haunts is the thick belt of courida along the shore. On the other hand, 
on the open grassy savannahs, at Coomacca, on the upper Berbice River, 
I saw it besporting itself like other butterflies. Not aspecimen of it was 
noticed in the clumps of wood. ‘his difference in habit may be attri- 
buted to the absence at Coomacea of big dragon-flies, notably Lepthemis 
vesciculosa, the common green dragon- -tly of our coast-lands, and, as far 
as I have observed, the oreatest enemy of the Junonia, and also to the 
presence of long grass w hich could atford a ready-to-hand refuge in case 
of pressing need, as further instanced. 
Ageronia feronia, a buttertly coloured like a Dominique or Plymouth 
Rock hen, has the power of making quite an audible curious sound with 
its wings. It loves to frequent places where there are numbers of big shady 
trees as in orchards and fruit walks, or on dams. Possessed of strong 
ample wings attached toa strong body, itis one of our most swiftly- flying 
butterflies, quite equalling in ‘this respect the stout-bodied skippers and 
hawk-moths. Male and female flit about in play, or male and male in 
dispute for a mate, perhaps, with lightning-like rapidity, making the while 
with their wings sharp clicking or crackling sounds, which, according 
to the hearer’s fancy, may be likened to the joints of a man’s body 
cracking in quick succession, to a type-writer rapidly manipulated by an 
expert, to stiff paper being crumpled, or to an explosion of tiny squibs. 
So swiftly they fly and in such a maze of geometrical figures that it is a 
matter of great difficulty to follow them, the difficulty of doing so being 
largely increased by their complicated colouration of bluish grey, dark 
brown, and white. After a few seconds of giddy wheel and frenzied 
flight, they suddenly separate in different directions, and take a breathing 
spell by aligthing head downward, on the trunk of a tree. Darwin 
mentions this butterfly as frequenting orange groves in Brazil, and refers 
to its stridulating powers and in its habit of alighting on tree trunks. 
Here it is fairly common in the cultivation aback of our villages and in 
that of cacao estates. Several other butterflies are now known to 
emit stridulating sounds, but Ageronia feronia is the first on which the 
