Abstract
The nest, prey, cocoon, curious inverse orientation of the cocoon, and some other aspects of the biology of Tracheliodes foveolineatus, an ant-predator, are described, analysed, and compared with relevant features of other Nearctic and Palearctic species of Tracheliodes. Species specificity of prey and wasp is discussed, as are some problems associated with the communal cells made by these wasps.
