Dufour's gland and poison gland chemistry of the myrmicine ant,Messor capensis (Mayr)

The Cape harvester ant,Messor capensis (Mayr), is widespread in the more arid regions of southern Africa, where it forms trails many meters long and harvests considerable quantities of seeds. The poison gland contains primarily the alkaloid, anabaseine, with minor amounts of the related alkaloid, anabasine, and an unidentified compound. The Dufour's gland contains predominantly alkanes and alkenes of carbon chain length 12–23.n-Pentadecane is the major component, with lesser amounts ofn-pentadecene,n-tridecane,n-heptadecane,n-tetradecane,n-heneicosene, andn-tricosene. The dienes,n-heneicosadiene andn-tricosadiene are rather unusual components of the Dufour's gland of ants.