For example, at one site in the prairies of Missouri, a F. This slave-maker enslaves colonies of Formica difficilis, Formica fusca, Formica pallidefulva and Formica podzolica, among others. When the workers of the slave-making species have become numerous enough, they start raiding for more slaves. The enslaved species belong to the Formica neogagates, F. The workers emerging from this brood accept the intruding queen as their own. The colony-founding female forces her way into a small colony of another species of Formica, somehow gets rid of its queen and workers and appropriates its nest and brood. All species are facultative slavemakers, i.e., species which usually or often have slaves but can get along without them. This species is a member of a group of Formica species that were formerly placed in the subgenus Raptiformica. In New Mexico (Mackay and Mackay 2002) - Aspen forests, disturbed areas. Nearctic Region: United States ( type locality). Latitudinal Range: 51.166325° to 33.641658°.ĭistribution based on Regional Taxon Lists United States: northeastern US, west to North Dakota and south to New Mexico. In Wisconsin this species is recognized by the shiny sides of the head and pronotum, and by the relatively long, curved, and abundant dorsal pilosity.Ĭanada, Quebec. The length of the scape is less than or equal to the length of the head. The hairs on the gaster are abundant, but are approximately as abundant (and of the same length) as the hairs on the pronotum. The metanotal impression of this species is deep, the head is usually broader than long, the eyes of the majors fail to reach the sides of the head, and there are usually 1 - 4 hairs on the underside of the head. This picture was taken in the flower plantings of a garden nick-nack store. Formica pergandei is the most common slavemaker in central Wisconsin, using various hosts, including Formica podzolica as here.
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