The Progress of the Race 
summer, however, some individuals of a par- 
ticular species, the Xylocopa cyanescens, may 
be found huddled together in a shivering 
group, on a stalk of asphodel, to spend 
the winter in common. Among the Xylo- 
cope this tardy fraternity is exceptional, but 
among the Ceratine, which are of their 
nearest kindred, it has become a constant 
habit. The idea is germinating. It halts 
immediately ; and hitherto has not succeeded, 
among the Xylocope, in passing beyond this 
first obscure line of love. 
Among other Apiens, this groping idea 
assumes other forms. The Chalicodome of 
the outhouses, which are building-bees, the 
Dasypode and Halicti, which dig holes in 
the earth, unite in large colonies to con- 
struct their nests. But it is an illusory crowd 
composed of solitary units, that possess no 
mutual understanding, and do not act in 
common. Each one is profoundly isolated 
in the midst of the multitude, and builds 
a dwelling for itself alone, heedless of its 
neighbour. ‘‘ They are,” M. Perez remarks, 
‘*a mere congregation of individuals, brought 
together by similar tastes and habits, but 
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