Abstract
The ratio of cis-2-methyl-6- n-undecylpiperidine ( cis C 11) to trans-2-methyl-6- n-undecylpiperidine ( trans C 11) in the venom of individual workers and soldiers of Solenopsis geminata and in individual alate queens of S. geminata, S. xyloni, S. invicta, and S. richteri was estimated. A considerable variation in this ratio was demonstrated between individuals of a particular caste within a species. In spite of considerable individual variation, the various species nevertheless exhibit a fair degree of control of the biosynthetic system for these 2,6-disubstituted piperidine alkaloids. Results obtained on one colony of S. geminata soldiers suggested that these individuals may have arisen from at least two fertile queens in the nest.
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