Wheeler, William Morton, 1865-1937.2005-10-062005-10-061907http://hdl.handle.net/2246/190493 p., 6 leaves of plates : ill. ; 24 cm.Includes bibliographical references.pt. 1. Observations. The parasitism of Orasema and other Chalcididae on ants. The parasitism of Mermis in ants. The parasitism of the Lomechusini. The commensalism of Metopina -- pt. 2. Concerning the polymorphism of ants. The typical, atypical and pathological phases of ants. The views of some previous authors on polymorphism. The ontogenetic and physiological aspects of polymorphism. The phylogenetic aspect of polymorphism. The ethological and psychological aspects of polymorphism.18790546 bytesapplication/pdfen-USQH1 .A4 vol.23, art.1, 1907Ants -- Variation.Polymorphism (Zoology)Ants -- Parasites.Ants -- Development.Host-parasite relationships.Ants -- Anatomy.text