570 BIONOMIC NOTES 
to be confined to the Lycaenidae , as the following examples 
prove. 
The common Jamaican Satyrine, Calisto zangis , Fabr., has a 
peculiarity of construction which appears significant. The anal 
angle of the hind-wing is somewhat produced, moreover on either 
under surface, at the angle, there is a small ocellus. When at rest 
the wings are raised over the back in the usual manner ; the abdo¬ 
men is covered by the hind-wings, which are folded closely under it, 
but the anal prolongation of the wing is everted at right angles, as 
in the lobed Lycaenids, and as in them the ocellus may be seen from 
above. On every occasion on which I noted the butterfly at rest 
it was upon the ground, so that I do not know whether it ever 
adopts the inverted attitude and is protected by a false head. 
But whether that be so or not, the approach to Lycaenid structure in 
a Satyrine is interesting. 
Fig. 19 .—Calisto zangis at rest: (a) side view, ( b ) from above, (c) from below. 
At first I thought that the eversion of the lobe in 0. zangis might 
be due to the pressure of the curved surface of the pill-box in which 
the butterfly was confined, but subsequently I was abundantly con¬ 
vinced that such is not the case, for when the butterfly rests on a 
flat surface with which the wing does not come in contact it is 
everted just the same. 
There is a well-developed lobe in the Oriental and Ethiopian 
Nymphaline genus Cyrestis , while the allied Neotropical genus 
Megalura has a somewhat similar structure (pointed out to me by 
Prof. Poulton), but I am not aware that the bionomic significance 
of these has as yet been worked out. 
The fine large, blue-grey Nymphaline Peridromia feronia , Hiibn., 
is a strong flyer, which has the unusual habit of settling upon tree- 
trunks, usually choosing palms with silvery-grey stems. The butter¬ 
flies harmonize wonderfully with the silvery-grey stems as they 
sit with wings fully expanded like Geometers, but always head 
