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Figures 28, 80
Eciton (Acamatus) melanocephalum subsp. xipe WheelerHNS, 1914: 41; worker. MEXICO, Hidalgo, San Miguel (MCZC).
DISTRIBUTION (Map 7)
UNITED STATES: Arizona; MEXICO: south at least to Oaxaca and Morelos. SPECIMENS EXAMINED
MEXICO, OAXACA: 14.5 km S Ocotlan , 1500 m (GCSC, WPMC). MORELOS: La Luz Tetecala (WPMC).
This rather large distinctive species is only rarely encountered in the United States and its principal range lies in Mexico and Guatemala. As discussed above, we believe that N. mandibularisHNS is the likely male of N. melanocephalusHNS, but it is also possible that N. mandibularisHNS could be the opposite sex of N. graciellaeHNS.
Found most commonly in these habitats: 3 times found in pine/oak forest, 2 times found in Acacia-oak woodland, 1 times found in oak-juniper woodland, 1 times found in university campus, 1 times found in xerophyl scrub, 1 times found in agricultural zone, 1 times found in oak/juniper woodland.
Found most commonly in these microhabitats: 2 times foraging raid, 1 times raiding columns, 1 times ground forager(s), 1 times under rock, 1 times on sidewalk, 1 times ground foragers, 1 times at light in room.
Collected most commonly using these methods: 3 times hand collecting, 2 times pitfall, 1 times search, 1 times at light, 1 times direct collection.
Elevations: collected from 1200 - 2290 meters, 1960 meters average