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Contents of poison apparatus and their relation to trail-following in the antDaceton armigerum
E D Morgan1, B Hölldobler, T Vaisar
1Department of Chemistry, University of Keele, Keele, Staffordshire, England.
Abstract:
The poison gland, which is the source of the trail pheromone inDaceton armigerum, contains a mixture of dimethylpyrazine, trimethylpyrazine and 3-ethyl-2,5-dimethylpyrazine in approximately equal proportions, similar to that of the antManica rubida. The cross-activity in trail-following tests with several other species can thus be explained. The Dufour gland ofD. armigerum contains a mixture of 26 identified hydrocarbons, chiefly 9-tricosene, tricosane, and 9-pentacosene. It also contains very small amounts of two sesquiterpene aldehydes, tetramorine-2 and tetramorine-3, already known in other myrmicine Dufour glands. No volatile substances were detected in the pygidial gland.
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