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Wheeler, G. C.; Wheeler, J. 1990b. Larvae of the formicine ant genus Polyrhachis. Transactions of the American Entomological Society 116:753-767. PDF
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Marikovsky, P. I. 1963b. A new ant, Polyergus nigerrimus Marik., sp. n., (Hymenoptera, Formicidae) and some features of its biology. Entomological Review (Washington) 42:58-59.

Notes: English translation of Marikovsky (1963a).

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Wheeler, W. M. 1918d. The ants of the genus Opisthopsis Emery. Bulletin of the Museum of Comparative Zoology 62:341-362. PDF
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