12 Proceedings 
The different species of Solitary Wasps, such as Ewmenes ~ 
and Odynerus, make cells of mud, either attached to twigs, 
or in holes in walls, or in the ground. They provision 
their nests with caterpillars. 
A Javan species of Ze‘hus, though structurally belong- 
ing to the solitary wasps, lives in large social communities. 
We now come to the Bees, and here we find a very much 
greater general resemblance between the different species, 
a few only being conspicuously different in colouring. 
I have often been asked whether there are other Bees 
besides the Hive Bee, and one or two kinds of Humble, 
or Bumble Bee. There are about two hundred species of 
Bees in England alone, and they are very much more 
numerous in warmer regions. 
Of our British Bees, only the Hive Bee, and the different 
species of Bomdbus, are social in their habits, living in 
communities and all working for the common welfare. 
The members of the other genera are solitary, in as 
much as each bee makes a separate burrow. There may 
be colonies, consisting of a dozen‘or so, or even of some 
hundreds, of these burrows placed near together, but each 
of these burrows is quite independent of all the rest. 
All the Bees, with the exception of three or four genera 
of Cuckoo Bees, as they are called, construct cells, in 
which is placed, in some cases honey, and in others a 
mixture of honey and pollen, and on this the larva, or 
grub, subsists. 
First on our list of Bees comes the genus Codlefes, com- 
prising a small number of very pretty little Bees, found 
only when the summer is well advanced. They fly about 
in the hottest sunshine, together with AZegachile argentata, 
Saropoda bimaculata, and a few others of similar habits. 
All Bees are fond of plenty of sunshine, but those I have 
just mentioned are most numerous, and most lively in 
places where the sand is so hot as to be unpleasant to 
walk upon. 
With the exception of one large species, found only on 
sand-hills near Liverpool, and which is more like a Hive 
Bee in appearance, the members of this genus are much 
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