278 NATURAL HISTORY. 
communities among the Ants as well as among men, and 
some interesting descriptions have been given of their 
battles. But the most remarkable fact in the history of 
Ants is the propensity of certain species to kidnap the 
workers of other species and train them as their slaves. 
The kidnappers are always red or pale colored, while 
those which are made slaves are black. The slaves are 
not captured after they have become Ants, but when 
they are in the pupa state. The ant-heap is attacked by 
the marauders when the cells are filled with pupex, and 
at no other time; a sanguinary battle is the consequence ; 
and the Red Ants, being uniformly victorious, carry off 
the pup to their own nest. Here the red workers take 
the same care of these pupe as they do of those belong- 
ing to their own community, and when the black work- 
ers come out from the pupa-cocoons, they very readily 
serve their captors. 
474. The insects of the Melliferous or honey-collecting 
division of the Aculeata are distinguished by a peculiar 
conformation of the hind feet. The first joint has the 
shape of a square plate, on the inside of which are hol- 
lows surrounded by brush-like tufts. In these baskets, 
as they may be called, the pollen of flowers is collected 
and carried to the nest. The insects of this division are 
all called Bees. Like the Wasps, they have two groups, 
the Solitary and the Social. Of the Solitary Bees, some 
form burrows in the ground; others build several cells 
together, covering them with sand or small gravel united 
by their viscid saliva, and hence are called Mason Bees ; 
others excavate cells in dead wood, and are called Car- 
penter Bees; and others still, the Upholsterer Bees, con- 
struct their nests from leaves, which they cut into the 
requisite shapes with great dexterity. 
475. Of the Social Bees there are two principal groups 
—the Bombi or Humble Bees, and the Hive Bees. The 
Humble Bees, of which there are many species, build 
their nests either under ground, or on the surface under 
