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Types Mus. Comp. Zool. Harvard.
Diagnosis A member of the crassicornisHNS group characterized in both the major and minor by exceptionally dense, long hair (reaching an extreme in the gastral pilosity of the major); and entire head (except frontal triangle and central piece of clypeus), mesosoma, and waist foveolate and opaque. In addition, the minor is unusual within the crassicornisHNS group in possessing a narrowed occiput seen in full-face view, yet nevertheless lacking a nuchal collar.
measurements (mm) Holotype major: HW 1.26, HL 1.34, SL 0.92, EL 0.22, PW 0.64.
Paratype minor: HW 0.58, HL 0.70, SL 0.86, EL 0.16, PW 0.42.
color Major: concolorous medium yellow with a very slight reddish tinge.
Minor: concolorous medium yellow.
range Recorded from the type locality (Michoacan); Azizintla, Guerrero; and Miacatlan, Morelos.
figure Upper: holotype, major. Lower: paratype, minor. MEXICO: San Jose Purua, Michoacan (A. b. Hamton). Scale bars = 1 mm.