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The male of the iberian endemic ant Formica dusmeti Emery, 1909 is described. The shorter scape and hairless appendices differentiate those males from those of the closest species F. frontalis Santschi and F. truncorum Fabricius. The distribution of F. dusmeti is updated.
It is shown that the name “Leptothorax nylanderi” as used by all earlier Russian authors, is a misidentification. The species distributed throughout East Europe and the Caucasus is really A. crassispinus Karawajew, 1926 (here revived from synonymy and stat. nov., and senior synonym of L. slavonicus Seifert, 1995 syn. nov.). There is a narrow zone of overlap of L. nylanderi and L. crassispinus in East...
The paper presents four cases of territorial ant colonies interfering in the course of Formica sanguinea Latr. raids against slave species which nest next to or in their territories. In three cases, Formica rufa L., when protecting its own territory, forced out (one case) or held (two cases) a raiding column of F. sanguinea, thus “saving” local Formica fusca L. nests from danger. In one case, Lasius...
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