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Types Mus. Comp. Zool. Harvard.
Diagnosis Similar in various characters to species listed in heading above, especially rosaeHNS, and distinguished as follows. Major: reddish yellow; frontal lobes extended forward as low but still conspicuous lobes, in side view; shallow antennal scrobes present, with surfaces smooth except for scattered foveae; postpetiole spinose; rugoreticulum on each side of head extends from eye to antennal fossa, posterior to eye for about an Eye Length distance, and anterior almost to the anterior genal border; carinulae extend to occiput, which is smooth; anterior half of pronotal dorsum carinulate; pilosity dense and long, with some hairs longer than Eye Length.
Minor: most of head and mesosoma variably foveolate; frontal lobes carinulate; humerus in dorsal-oblique view denticulate; propodeal spines reduced to denticles.
Measurements (mm) Holotype major: HW 1.22, HL 1.28, SL 0.54, EL 0.16, PW 0.72.
Paratype minor: HW 0.62, HL 0.64, SL 0.54, EL 0.12, PW 0.40.
color Major: body and mandibles reddish yellow, appendages plain dark yellow.
Minor: concolorous light reddish yellow.
Range Known only from the type locality.
Figure Upper: holotype, major. Lower: paratype, minor. ARGENTINA: Palermo, Buenos Aires (R. Thaxter). Scale bars = 1 mm.