F-504087 
FIGURE 200.—Cross-section of an oak log showing galleries made by 
carpenter ants. 
and are kept free of frass. The presence of large black ants run- 
ning about the house; swarms of large black, winged ants about 
the house in the spring; piles of sawdust-like borings; slit-like 
holes in woodwork such as window and door casings; and faint 
rustling sounds in walls, floors, woodwork, and flush-panel doors 
are all evidences of infestation in a house. Where infestations are 
of long standing, damage to structural timbers may be severe 
and require extensive repairs. Telephone and telegraph poles also 
are subject to serious damage (fig. 201) (272). 
Overwintering males and females in colonies over 3 years old 
engage in nuptial flights from May to late July. Fertilized females 
then establish nests in cavities, usually under the bark of a tree, 
COURTESY CONN. AGR. EXPT. STA. 
FIGURE 201.—Colony of carpenter 
ants in a 2-foot section of a tele- 
phone pole in winter. Arrow in- 
dicates ground level. 
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