370 Address of A. R. Wallace at the Glasgow Meeting. 
bine with increased longevity the advantage of increased size 
in the struggle for existence with the ferns and other early colo- 
nists, and these advantages have led to its being independently 
produced in so many distant localities, whose chief feature in 
common is their remoteness from continents and the extreme 
poverty of their insect life. 
As the sweet odors of flowers are known to act in combina- 
tion with their colors, as an attraction to insects, it might 
anticipated that where color was deficient scent would be so 
also. On applying to my friend Dr. Hooker for information 
as to New Zealand plants, he informed me that this was cer- 
tainly the case, and that the New Zealand flora is, speaking 
generally, as strikingly deficient in sweet odors as in conspicu- 
ous colors. Whether this peculiarity occurs in other islands I 
have not been able to obtain information, but we may certainly 
expect it to be so in such a marked instance as that of the Gala- 
pagos flora. ne 
Another question which here comes before us is the ongin 
these abound, and would thus not be required in come 
where insects were very scarce. But it seems opposed to a 
ants, except where the secretion is only slightly 
the orange tribe, orange-trees being sometimes entir 
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