Taxonomic history
| Raised to species: Kannowski, 1956: 185; Wheeler, 1968 PDF: 163. |
| Senior synonym of Polyergus bicolor, Polyergus umbratus: Wheeler, 1968 PDF: 163. |
| Material of the unavailable names Polyergus fusciventris, Polyergus montezuma, Polyergus silvestrii referred here by Creighton, 1950a PDF: 559. |
| See also: Hölldobler, 1985: 225. |
Found most commonly in these habitats: 3 times found in Pasture, 2 times found in meadow, 3 times found in Redshank chaparral, 1 times found in Low meadow, 1 times found in Ponderosa Pine Forest, 1 times found in Aspen forest, 1 times found in mixed woodland, 2 times found in conifer forest, 1 times found in Oak woodland, 1 times found in roadside edge in conifer forest, ...
Collected most commonly using these methods or in the following microhabitats: 9 times search, 2 times under rock, 2 times in pitfall trap, 3 times Bay Area Ant Survey (BAAS), 1 times domed nest, 1 times large domed nest, 3 ft. diam., 1 times log stage 4, 1 times log stage 5, 2 times (=incip. col. P1 collected Aug 1982)
Elevations: collected from 30 - 3060 meters, 1596 meters average
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