Background Strongylognathus Mayr, 1853 is a Palaearctic genus, comprising 25 ant species and one subspecies, all permanent social parasites, infesting colonies of various species of Tetramorium Mayr, 1855. They have patchy distribution throughout their areas and most of them are very rare and listed as vulnerable. The taxonomy of the Strongylognathus huberi group needs thorough revision and the results presented below can be considered as preliminary. New information Four species of the socially parasitic ant genus Strongylognathus (S. karawajewi Pisarski, 1966, S. huberi dalmaticus Baroni Urbani, 1969, S. afer Emery, 1884 and S. italicus Finzi, 1924) are recorded for the first time from Bulgaria and, together with the previously-known S. testaceus and S. bulgaricus stat. rev., their total number reaches six. The taxonomic position and geographic distribution of all species are discussed and a Key for their identification, based on worker caste, is compiled.

中文翻译：

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保加利亚的蚁类Strongylognathus（膜翅目，昆虫纲）

背景背景强壮对虾梅尔，1853年是古白蜡虫属，由25种蚂蚁物种和一个亚种组成，所有永久性社会寄生虫，侵染了四旬期迈尔各种物种的殖民地，1855年。它们在整个地区分布不均，大多数是非常稀有的，已被列出。作为弱势群体。需要对圆线虫的分类进行彻底的修订，下面给出的结果可以认为是初步的。新信息保加利亚首次首次记录了四种社会寄生蚁纲（S. karawajewi Pisarski，1966，S. huberi dalmaticus Baroni Urbani，1969，S. afer Emery，1884和S. italicus Finzi，1924）。以及先前已知的S. testaceus和S. bulgaricus stat。转，他们的总数达到六。