Young, J.; Howell, D. E. 1964. Ants of Oklahoma. Miscellaneous Publication. Oklahoma Agricultural Experimental Station 71:1-42.

Zakharov, A. A. 1972. Intraspecific relations in ants. [In Russian.]. Moskva: Nauka, 216 pp.

Notes: Date signed for printing ("podpisano k pechati").

Zakharov, A. A. 1975. Evolution of the social mode of life in ants. [In Russian.]. Zoologicheskii Zhurnal 54:861-872.

Notes: June issue. Date signed for printing ("podpisano k pechati"): 26 May 1975.

Yoshioka, H. 1939b. A new ant of the genus Dolichoderus from Japan. Transactions of the Kansai Entomological Society 8:70-71. PDF

Young, A. M. 1983. Patterns of distribution and abundance of ants (Hymenoptera: Formicidae) in three Costa Rican cocoa farm localities. Sociobiology 8:51-76.

Young, A. M. 1986. Notes on the distribution and abundance of ground- and arboreal-nesting ants (Hymenoptera: Formicidae) in some Costa Rican cacao habitats. Proceedings of the Entomological Society of Washington 88:550-571.

York, A. 1994. The long-term effects of fire on forest ant communities: management implications for the conservation of biodiversity. Memoirs of the Queensland Museum 36:231-239.

Yoshioka, H. 1939a. A list of the ants of Gumma Prefecture. [In Japanese.]. Transactions of the Kansai Entomological Society 8:64-69. PDF

Yensen, N. P.; Clark, W. H.; Francoeur, A. 1977. A checklist of Idaho ants (Hymenoptera: Formicidae). Pan-Pacific Entomologist 53:181-187. PDF

Yensen, N.; Yensen, E.; Yensen, D. 1980. Intertidal ants from the Gulf of California, Mexico. Annals of the Entomological Society of America 73:266-269.

Yasumatsu, K.; Hirashima, Y. 1965. Aculeate Hymenoptera collected by Lepidopterological Society of Japan expedition to Formosa in 1961. Special Bulletin of [the] Lepidopterological Society of Japan 1:175-177.

Notes: Ants p. 175.

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

Yasuno, M. 1963. The study of the ant population in the grassland at Mt. Hakkôda. I. The distribution and nest abundance of ants in the grassland. Ecological Review 16:83-91.

Yasumatsu, K. 1941d. Some ants from the Linshoten Islands. [In Japanese.]. Kontyû 15:22-23. PDF

Yasumatsu, K. 1941e. On the new habitat of Tapinoma indicum in Japan. [In Japanese.]. Mushi 14:11. PDF

Yasumatsu, K. 1941f. On the new habitat of Formica exsecta fukaii. [In Japanese.]. Mushi 14:14. PDF

Yasumatsu, K.; Brown, W. L., Jr. 1957. A second look at the ants of the Camponotus herculeanus group in eastern Asia. Journal of the Faculty of Agriculture, Kyushu University 11:45-51. PDF

Yasumatsu, K.; Brown, W. L., Jr. 1951. Revisional notes on Camponotus herculeanus Linné and close relatives in Palearctic regions (Hymenoptera: Formicidae). Journal of the Faculty of Agriculture, Kyushu University 10:29-44. 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

Yasumatsu, K. 1941b. Camponotus vagus yessoensis in Mt. Hikosan, Kyusyu. [In Japanese.]. Mushi 13:96. PDF

Yasumatsu, K. 1941c. Ants collected by Mr. H. Takahasi in Hingan (Hsingan) North Province, North Manchuria (Hymenoptera, Formicidae). [In Japanese.]. Transactions of the Natural History Society of Formosa 31:182-185. 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. 1940e. Ants from Kyusyu. [In Japanese.]. Kyodo Shizen 5:1-5.

Notes: Not seen. Cited in Okano (1989) and Onoyama & Terayama (1994).

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. 1940a. Contributions to the hymenopterous fauna of Inner Mongolia and North China. Transactions of the Sapporo Natural History Society 16:90-95. PDF

Notes: Ants p. 91.

Yasumatsu, K. 1940b. Some ants from Sanko Province in Manchuria. [In Japanese.]. Mushi 13:42. PDF

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