46 PROCEEDINGS eF THE VICTORIA INSTITUTE. 
wings have two pairs of black spots, each pair enclosed by can oval 
black figure, and both then enclosed by black concentric circles. 
From the peculiar markings described above these butterflies are 
called Eighty-eights, a name which has come to us from the 
English residents in Brazil. It is difficult to understand the 
object of these markings, for though the dark colour of the upper 
surface of the wings serves to conceal the butterfly when flying, 
the grotesque markings on the under surface render it very 
conspicuous when at rest with the wings closed. 
Another common member of this family in Trinidad is 
Gynoecia divce, commonly known as the Zebra. It has a jerky 
irregular flight, and when after thus successfully eluding the 
collector, it settles on a tree trunk with its wings closed, the 
brown and grey stripes on the under surface of the wings so closely 
resemble the bark that detection is extremely difficult. The 
upper side of the wings is brown, with a broad yellow band 
running obliquely across. 
Ageronia feronia is also very commonly met with here. 
Locally it is known as the Guinea bird. It at once attracts 
attention by the crackling noise which it makes with its wings 
during flight. The upper surface of the wings is beautifully 
tesselated with black and grey, and when the butterfly settles, as 
it is so fond of doing, with open wings on a hog plum, sandbox 
or other tree with rough grey bark, it is very hard at a distance 
to distinguish the butterfly from the bark. It seems to mimic 
its surroundings with the upper surface of the wings, while 
Gyncecia dirce does the same with the under surface. 
The beautiful Ageronia Areihusa shows much less of this 
mimicry and is far more local. Indeed I have only seen it on 
one or two trees in the Maraval valley 7 where its blue and black 
upper surface at once distinguished it from the grey bark of the 
tree. 
Didonis biblis is often seen in the woods hovering over 
bushes. It is brownish black with a broad red sub-marginal 
band on the hind wings. 
