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[dspdrew]

Location:  O'Neill Regional Park, Orange County, California.
Habitat:  Coastal sage scrub foothills. Nested in the ground in what looked like a single entrance nest.
Coloration, hue and pattern:  Dark red head and thorax, black gaster.
Length:  4.5mm - 6.5mm.
Distinguishing characteristics:  Polymorphic, Very fast moving at times.
These ants were foraging all around the nest in large numbers around noon, but a little later in the day, it looked like they were all back in the nest, with maybe one still roaming around outside.

[dspdrew]

Myrmecocystus sp.