4 LEAFLET 147, U. 8. DEPARTMENT OF AGRICULTURE 
In houses it feeds almost entirely upon greasy substances. It is best 
controlled by use of a poisoned bait (formula 4). Ifit is known where 
FIGURE 3.—Winged female of the large black, or carpenter, ant. About 5 times natural size. 
the ants are coming from in the yard, the poison can be placed there 
and kept out of the house. 
The pavement ant (Tetramorium caespitum L.), introduced from 
Europe, is well established along our Atlantic coast and builds its 
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FIGURE 4.—The Argentine ant: A, Wingless female. B, Worker. C, Male. D, Immature stages: a, Eggs: 
b, young larva; c, full-grown larva; d, pupa, side view; e, pupa, ventral view; f, pupa, dorsal view. All 
about 12 times natural size. 
nests beneath brick, stone, and cement pavings and from these situa- 
tions finds its way into houses. The colonies are easily killed with 
