Nomamyrmex esenbeckii wilsoni

Identification
Watkins (1977) - Workers: transversely keeled posterior margin of mesonotum slightly to moderately concave in the middle; entire dorsum of propodeum with prominent longitudinal rugae, several of which extend to its posterior edge; postpetiole more subquadrate than crassicornis (= Nomamyrmex esenbeckii) and sometimes only slightly less subquadrate that esenbeckii s. str.; gaster more nearly the color of the alitrunk than workers of crassicornis. Males: setae on fifth gastric tergite distinctly separated along the midline; longitudinal rugae indistinct or absent on second gastric tergite, except sometimes in sulcus at anterior edge; distal one-half of volsella (lateral view) straight with a blunt, somewhat truncated apex.

Distribution
Watkins (1977) - Ranges from Austin, Texas (near 30° North latitude) southward through the northern two-thirds of Costa Rica. In northeastern Mexico its range is bordered on the west by the Sierra Madre Oriental.

Distribution based on Regional Taxon Lists
Nearctic Region: United States. Neotropical Region: Costa Rica, Guatemala, Mexico.

Nomenclature

 *  wilsoni. Eciton (Labidus) esenbecki st. wilsoni Santschi, 1920d: 366 (m.) U.S.A. Combination in E. (Nomamyrmex): Smith, M.R. 1951a: 779; in Nomamyrmex: Borgmeier, 1953: 13. Currently subspecies of esenbeckii: Borgmeier, 1955: 139; Watkins, 1977a: 205.