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Worker diagnosis. Scape and pronotum without erect hairs; pronotum weakly shiny, sharply sculptured and densely pubescent; medial carina present; T 3 - T 4 each with several erect hairs.
Worker measurements (mm) (n = 4). HW 0.88 - 0.96; HL 0.88 - 0.95; SL 0.57 - 0.65; EL 0.21 - 0.23; OVD 0.31 - 0.35; PNW 0.53 - 0.58; PPW 0.34 - 0.41; WL 1.02 - 1.10. Indices. CI 99 - 101; CNI 133 - 153; OI 23 - 25; SI 64 - 69.
Worker description. The worker has been adequately described by Shattuck (1991).
Queen and male unknown.
In A. occidentalisHNS the pronotum lacks erect hairs, but they are present on gastral terga 3 and 4, and the distance across the propodeal spines is subequal to the propodeal width, a combination of features unique to this western species.
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Antweb is funded from private donations and from grants from the National Science Foundation, DEB-0344731, EF-0431330 and DEB-0842395. Sun Aug 14 12:44:38 PDT 2022.