Neivamyrmex melanocephalus (Emery),

Snelling, G. C. & Snelling, R. R., 2007, New synonymy, new species, new keys to Neivamyrmex army ants of the United States., Advances in ant systematics (Hymenoptera: Formicidae): Homage to E. O. Wilson - 50 years of contributions. (Memoirs of the American Entomological Institute 80), pp. 459-550: 478-479

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Neivamyrmex melanocephalus (Emery)


Neivamyrmex melanocephalus (Emery)  HNS 

Figures 28, 80

Eciton (Acamatus) melanocephalum Emery  HNS  , 1895: 260 (w). MEXICO, Tepic ( MHNG)  .

Eciton (Neivamyrmex) melanocephalum  HNS  : M. R. Smith, 1942: 549 (w) (part). Creighton, 1950: 72 (part).

Neivamyrmex melanocephalus  HNS  : Borgmeier, 1953: 19. Borgmeier, 1955: 385 - 387 (w).

Eciton (Acamatus) melanocephalum subsp. xipe Wheeler  HNS  , 1914: 41; worker. MEXICO, Hidalgo, San Miguel (MCZC).


UNITED STATES: Arizona; MEXICO: south at least to Oaxaca and Morelos. SPECIMENS EXAMINED

UNITED STATES, ARIZONA: Santa Cruz Co.: Upper White Rock Campground , Pena Blanca Lake (31.39 ° N 111.08 ° W), 1200 m ( GCSC, LACM)GoogleMaps  ; Nogales , on sidewalk ( USNM)  .

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. mandibularis  HNS  is the likely male of N. melanocephalus  HNS  , but it is also possible that N. mandibularis  HNS  could be the opposite sex of N. graciellae  HNS  .

One foraging raid of N. melanocephalus  HNS  was observed. It occurred in full daylight and the workers were taking a variety of small arthropods (B. V. Brown, pers. comm).


Switzerland, Geneva, Museum d'Histoire Naturelle


Switzerland, Geneva, Museum d'Histoire Naturelle


Gordon C. Snelling


USA, California, Los Angeles, Los Angeles County Museum of Natural History


USA, Washington D.C., National Museum of Natural History, [formerly, United States National Museum]