Zettel, H.; Sorger, D. M. 2011. New Myrmoteras ants (Hymenoptera: Formicidae) from the southeastern Philippines. Raffles Bulletin of Zoology 59:61-67. PDF

Yasumatsu, K.; Murakami, Y. 1960. A revision of the genus Stenamma of Japan (Hymenoptera, Formicidae, Myrmicinae). Esakia 1:27-31. PDF

Yoshimura, M.; Fisher, B. L. 2007. A revision of male ants of the Malagasy region (Hymenoptera: Formicidae): key to subfamilies and treatment of the genera of Ponerinae. Zootaxa 1654:21-40. PDF

Yoshimura, M.; Onoyama, K.; Ogata, K. 2007. The ants of the genus Odontomachus (Insecta: Hymenoptera: Formicidae) in Japan. Species Diversity 12:89-112. PDF

Yoshimura, M.; Fisher, B. L. 2011. A revision of male ants of the Malagasy region (Hymenoptera: Formicidae): key to genera of the subfamily Dolichoderinae. Zootaxa 2794:1-34. PDF

Yamauchi, K.; Hayashida, K. 1968. Taxonomic studies on the genus Lasius in Hokkaido, with ethological and ecological notes (Formicidae, Hymenoptera). I. The subgenus Dendrolasius or Jet Black Ants. Journal of the Faculty of Science, Hokkaido University. Series VI. Zoology 16:396-412. PDF

Yano, M. 1910a. On the ants of Japan. [In Japanese.]. Dobutsugaku Zasshi (Zoological Magazine) 22:416-425. PDF

Yano, M. 1911b. A new slave-making ant from Japan. Psyche (Cambridge) 18:110-112. PDF

Notes: Stamp date in MCZ library: 1911.07.07.

Yarrow, I. H. H. 1967. On the Formicidae of the Azores. Boletim do Museu Municipal do Funchal 21:24-32. PDF

Yarrow, I. H. H. 1954a. The British ants allied to Formica fusca L. (Hym., Formicidae). Transactions of the Society for British Entomology 11:229-244. PDF

Yarrow, I. H. H. 1954c. Application for the re-examination and re-phrasing of the decision taken by the International Commission regarding the name of the type species of "Formica" Linnaeus, 1758 (Class Insecta, Order Hymenoptera). Bulletin of Zoological Nomenclature 9:313-318.

Yarrow, I. H. H. 1955a. The British ants allied to Formica rufa L. (Hym., Formicidae). Transactions of the Society for British Entomology 12:1-48. PDF

Yarrow, I. H. H. 1955c. The type species of the ant genus Myrmica Latreille. Proceedings of the Royal Entomological Society of London. Series B 24:113-115. PDF

Yasumatsu, K. 1950. Discovery of an ant of the genus Lordomyrma Emery in eastern Asia (Hym.). Insecta Matsumurana 17:73-79. PDF

Yasumatsu, K. 1960. The occurrence of the subfamily Leptanillinae in Japan (Hymenoptera, Formicidae). Esakia 1:17-20. PDF

Yasumatsu, K. 1962. Notes on synonymies of five ants widely spread in the Orient (Hym.: Formicidae). Mushi 36:93-97. PDF

Yasumatsu, K. 1940c. Matériaux pour servir à la faune myrmécologique des îles de Yaeyama. Mushi 13:67-70. PDF

Yasumatsu, K. 1940d. Beiträge zur Kenntnis der Ameisenfauna Mikronesiens. I. Die Ameisengattung Anochetus Mayr der Karolinen. Annotationes Zoologicae Japonenses 19:312-315. PDF

Yasumatsu, K. 1941a. On the ants of the genus Dolichoderus of Angaran element from the Far East (Hymenoptera, Formicidae). [In Japanese.]. Kontyû 14:177-183. PDF

Xu, Z.; Zhang, W. 1996. A new species of the genus Gnamptogenys (Hymenoptera: Formicidae: Ponerinae) from southwestern China. Entomotaxonomia 18:55-58. PDF

Xu, Z.-H.; Chai, Z.-Q. 2004. Systematic study on the ant genus Tetraponera F. Smith (Hymenoptera: Formicidae) of China. Acta Zootaxonomica Sinica 29:63-76. PDF

Xu, Z.-H.; Wang, W.-H. 2004. The third species of the ant genus Perissomyrmex Smith (Hymenoptera: Formicidae) in the world. Entomotaxonomia 26:217-221. PDF

Xu, Z.-H.; Zeng, G. 2000. Discovery of the worker caste of Platythyrea clypeata Forel and a new species of Probolomyrmex Mayr in Yunnan, China (Hymenoptera: Formicidae). Entomologia Sinica 7:213-217. PDF

Xu, Z.-H.; Zhou, X.-G. 2004. Systematic study on the ant genus Pyramica Roger (Hymenoptera, Formicidae) of China. Acta Zootaxonomica Sinica 29:440-450. PDF

Yamane, S. 1996. New synonymy in the genus Aphaenogaster Mayr (Hymenoptera, Formicidae). Species Diversity 1:111-115. PDF

Yamane, S.; Bui, T. V.; Eguchi, K. 2008. Opamyrma hungvuong, a new genus and species of ant related to Apomyrma (Hymenoptera: Formicidae: Amblyoponinae). Zootaxa 1767:55-63. PDF

Yamane, S.; Hashimoto, Y. 1999. A remarkable new species of the army ant genus Aenictus (Hymenoptera, Formicidae) with a polymorphic worker caste. Tropics 8:427-432.

Yamane, S.; Terayama, M. 1999. A new species of Pristomyrmex Mayr from Japan, and a proposal of a new synonym of species in the genus Camponotus Mayr (Hymenoptera: Formicidae). Memoirs of the Myrmecological Society of Japan 1:17-24. PDF

Xu, Z.-H.; Liu, X. 2012. Three new species of the ant genus Myopias (Hymenoptera: Formicidae) from China with a key to the known Chinese species. Sociobiology 59:819-834. PDF

Xu, Z.; Zheng, Z. 1994. New species and new record species of the genus Tetramorium Mayr (Hymenoptera: Formicidae) from southwestern China. [In Chinese.]. Entomotaxonomia 16:285-290. PDF