Notes on the Interspecific, Mixed Colonies in the Harvester Ant Genus Pogonomyrmex

Bert Hölldobler, Hubert Markl
1989 Psyche: A Journal of Entomology  
During our long-term investigations on colony interactions and communication in the harvester ants (Pogonoymrmex) in the Chihahuan desert near Portal, Arizona and Rodeo, New Mexico, we occasionally observed interspecific, mixed colonies of P. rugosus and P. barbatus. In all cases it appeared that P. barbatus workers were incorporated into a P. rugosus nest, because P. barbatus were by far in the minority. We first noted this phenomenon in July 1974, when we encountered a P. rugosus nest, where
more » ... ugosus nest, where approximately 5% of the workers emerging from the nest entrance were P. barbatus. Between 1974 and 1988 we observed 9 additional such incidents. The percentage of Hindawi Publishing Corporation
doi:10.1155/1989/47982 fatcat:ruckrnkqtvhkjdu3ldll4zqalm