stabilized during the remainder of the exposure. This indicated that the bees were consuming nectar at the rate it was being gathered. Even though ~ 50% of the foraging bees in both colonies were collecting pollen, the quantity of stored pollen remained low throughout the study in both colonies. Almost all of the pollen was being consumed during brood rearing activities. The weights of the microwave and sham colonies followed similar trends for 3 of the 4 weeks of the study (Fig. 12). Weights of the two colonies never exceeded a 5% difference. Of the 114 g difference at the conclusion, 37 g can be accounted for by a greater population of adults in the microwave-treated colony (2609) compared to the sham colony (2393). Otherwise, differential brood quantities accounted for the remaining weight difference. Both colonies had slightly greater adult populations at the end of the study. Our study suggests that honey bees function normally at power densities expected near the edge of the SPS rectennae. Our data support the hypothesis that inverte-
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