I originally thought that this species was either Manica, or Myrmica, but after closer inspection I think I am going with Myrmica. This is the first time that I've seen a Myrmica sp. (if it is one), so I would like to know other's opinions on what this could be.
Length: 4mm
Coloration: Abdomen: Solid Black. Thorax: Dark Red/Brown. Head: Dark Brown/Dark Red. Antennae: Light Brown. Legs: Dark Brown/Dark Red]
Location: Nevada