A Second Parasitic Crematogaster

William Morton Wheeler
1933 Psyche: A Journal of Entomology  
In 1930 I described in this journal a diminutive, presumably parasitic, emale ant, Crema.togaster (Acroceelia) kennedyi, taken by Professor C. H. Kennedy in Indiana 2rom a colony of our common acrobat ant, C. lineolata Say. Now Dr. W. S. Creighto.n has sent me winged iemales of another closely related form which he collected recently at Roanoke, Virginia, in a colony of C. pilosa Pergande. Since the colony also contained many females of the host, the alternatives discussed in my previous paper,
more » ... my previous paper, seem to be applicable to this case. We may suppose that we are dealing either with a workerless parasite or with a remarkable dimorphism and dichromatism o the emales of lineolata and pilosa. The latter supposition seems to be improbable because the occurrence of two orms of emales cannot be a normal peculiarity of lineolata, since in hundreds oi colonies of this ant examined by myself and others during the past 40 years only females of the large type have been encountered. And though smaller iemales occasionally occur in colonies of certain tropical species of Crematogaster, they are always ew in number, wingless and ergatomorphic, and therefore quite unlike the perfect, winged microgynes taken by Prof. Kennedy and Dr. Creighton. Nevertheless, a rather serious objection to the interpretation of these insects is the presence of virgin emales oi the host species in the same nest. This has never been observed in any of the numerous recorded cases of ant parasitism. In the European Strongylognathus testaceus, however, the mother queen of the host colony (Tetramorium cxspitum) is not eliminated after the intrusion of the parasitic remale, and Wasmann described a flourishing mixed colony of these ants in which a few male pupm of the host species
doi:10.1155/1933/51878 fatcat:5ax6t2rsfrcrplnj7iqgvrvhvy