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Two aberrant forms of the red imported fire ant Solenopsis invicta Buren have been reported in the literature. The first was a gyandromorph (an individual having both male and female characteristics) found by Hung (1975) and the second, an intercaste (an individual with characteristics intermediate between a worker and a female alate) by Glancey et al. (1980). We now report the finding of a new morphological form which was apparently caused by environmental factors.