some Rest-attitudes of Butterflies, 109 
A female Hypolycena philippus, Fab., exhibited a “ false 
head,” but was not seen at rest. 
Sept. 15. Victoria Falls. A specimen of Catochrysops 
malathana, Bois. (=asopus, Hopff.), was seen in the Rain 
Forest settled with its head downwards. 
Sept. 26. East London. Two specimens of Tarucus 
telicanus, Lang., were seen in the Queen’s Park sitting 
horizontally. They were moving their hind-wing alter- 
nately in the plane of the gs “exactly as I had in the 
Nilgiris seen a Lampides do.* 
Tilt to one side, or “ list.” 
This, which I first described as “a sideways attitude,” a 
term not without ambiguity, may be exactly defined as an 
attitude resulting from a rotation of the insect about its 
longitudinal axis, as heliotropism results from a rotation 
about an imaginary vertical axis at right angles to this. 
Heliotropism corresponds to the movement of a vessel in 
answer to the helm. Most vessels, independently of wind, 
waves, or tide, have a tendency to lean somewhat to one 
side or the other ; this inclination is termed by sailors “a 
list,” and, although I am aware that the analogy is not 
quite close, since the insect may lean at one moment to 
one side, at another to the other, I shall for brevity term 
such an inclined or tilted position a (ist. 
So far as I know this list was first observed by Col. C. 
T. Bingham in the case of a Melanitis in 1878, but the 
observation was not published till long afterwards. The 
extracts from his diary of that year, brought to light by 
Prof. Poulton, give a most vivid description of some ‘phases 
of the struggle “for existence as it may be seen in a tropical 
forest. Col. Bingham says :— 
The Melanitis was there among dead leaves, its wings 
folded and looking, for all the world, a dead dry 
leaf itself. With regard to MJelanitis, I have not 
seen it recorded anywhere that the species of this 
genus when disturbed fly a little way, drop suddenly 
into the undergrowth with closed wings and in- 
variably lie a little askew and slanting, which still 
more increases their likeness to a dead leaf casually 
fallen to the ground.+ 
* Trans, Ent. Soc. Lond., 1905, p. 118. 
t Trans. Ent. Soc. Lond., 1902, p. 363. 
