112 ON: THE LIFE-HISTORY OF THE LEAF-INSECT. [ Feb. 2, 
immense quantity of foliage. The male generally selects his 
mate during the night, and copulation takes place at some time 
between 8 a.m.and 3 p.m. the following day. The sexes are 
united for at least two hours. 
I have not been able to ascertain so far the exact number of 
eggs produced by one individual, but think that from eighty-five 
to a hundred is the probable number. 
Summary.—The Phylliums are dependent upon a very warm 
and moist atmosphere, and are therefore more or less confined 
to the islands in the tropical zone: in all stages they are very 
similar, both in colour and habits, to various plant-structures. 
Post-embryonic development is slow and takes place by a gradual 
increase in size of the individual, adults only differing externally 
from the young larve in the possession of fully developed 
tegmina and wings. The sexual dimorphism is pronounced, the 
females being large and foliaceous, whilst the males are much 
smaller and although flat are not characterised by such a leaf- 
like appearance as the females. 
Tn conclusion, I wish to express my indebtedness to Professor 
Hickson and Mr. Hewitt for their kind assistance. 
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