Cash 
touch a butterfly. Some years ago the question was raised 
by the Bombay Natural History Society, and he, with others, 
took notes on the subject. He recorded two cases only 
dyring three years’ observing. It was significant that while 
the flocks of locusts and white ants were attended by 
vertebrates of all orders, the flocks of butterflies in Ceylon 
(locally known as ‘‘snowstorms’’) were attended by one 
species only of bird, and that but seldom. 
In his opinion the enemies of butterflies were chiefly, if not 
entirely invertebrate. In Ceylon two protected species, 
Kuplea core and Delias eucharis, were largely taken by a 
mantis, Gongylus gongyloides, while two of the large Asilide, 
Promachus maculatus and Seleropogon ambryon preyed largely 
on Danais limnace. 
Mr. Buanprorp: In criticizing the term ‘‘ homeochroma- 
tism ’’ Prof. Poulton had, he thought, somewhat mistaken 
the speaker’s attitude. He had no intention whatever of 
excluding theoretical considerations, even if he could not 
accept them at their full value. But it was obviously unjust 
that a class of facts, about which there could be no dispute, 
should be labelled with a collective name implying the 
acceptance of a theory which, however well it might stand 
criticism, had certainly not yet been established. He 
preferred to keep one terminology for the facts and another 
for the explanatory theory. 
The wideness of meaning which he proposed to attach to 
the term ‘‘homcochromatism”’ required some explanation. 
Certainly he conceded that it covered cases of Batesian 
municry; but if generally adopted, it would probably prove 
convenient to give it a more restricted and conventional 
meaning by their exclusion: such a conventional limit had 
constantly to be applied in terminology. In order to keep 
the nomenclature of these facts independent of speculation it 
seemed desirable to employ the words ‘‘ mimic ” and “ model” 
without reference to the questions of Batesian or Miillerian 
mimicry, the essential character of a ‘‘ mimic ’’ being that of 
a wide departure from the general type of its genus or 
subfamily with a resulting likeness to a model which was not, 
or scarcely, modified thereby; in hommochromatism, as he 
