Carpenter ants (1989)
"Carpenter ants are generally jet black, but there may be color variants with considerable red. They are large for ants; their size varries from one-eighth to one-half inch in length. This variation is due to the presence in most colonies of both 'major' and 'minor' workers."--First page.
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Provided for historical documentation only. Check Missouri Extension and Agricultural Experiment Station websites for current information.