%0 Journal Article %T The Origin of Workerless Parasites in Leptothorax (S. Str.) (Hymenoptera: Formicidae) %A Jü %A rgen Heinze %J Psyche %D 1995 %I Hindawi Publishing Corporation %R 10.1155/1995/69812 %U http://dx.doi.org/10.1155/1995/69812