FIGURE 2 in A New Species of Seed-harvester Ant, Pogonomyrmex hoelldobleri (Hymenoptera: Formicidae), from the Mohave and Sonoran Deserts of North America

FIGURE 2. Photographs of diagnostic characters to distinguish between workers of P. magnacanthus Cole and those of P. hoelldobleri Johnson, Overson & Moreau and P. m o h a v e n s i s Johnson. Photograph of P. magnacanthus PARATYPE worker: (A) eye and malar area (MOD = 0.44, OI = 29.5, MR = 0.98), and circumocular whorls indistinct to absent, moderately granulate toward vertex, and (B) circumocular whorls present. Photograph of P. hoelldobleri worker: (C) eye and malar area for HOLOTYPE worker (MOD = 0.36, OI = 23.2, MR = 1.17), and absence of circumocular whorls—rugae converging near vertex, and (D) absence of circumocular whorls—area posterior to eyes with faint rugae. Photograph of P. m o h a v e n s i s worker: (E) eye and malar area for PARATYPE worker (MOD = 0.33, OI = 21.7, MR = 1.36), and absence of circumocular whorlsrugae extending to vertex, with rugae becoming weak to absent on/near vertex, and (F) absence of circumocular whorls—rugae extending to vertex; vertex rugose.