Yarrow, I. H. H. 1954b. Formica exsecta Nylander (Hym., Formicidae) in the British Isles. Entomologist's Monthly Magazine 90:183-185.

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. 1955b. The British Strongylognathus (Hym., Formicidae). Journal of the Society for British Entomology 5:114-115.

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

Yarrow, I. H. H. 1956. Formica rufa L. (Hym., Formicidae) in Oxfordshire. Entomologist's Monthly Magazine 92:8.

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. 1968. Sifolinia laurae Emery 1907, a workerless parasitic ant new to Britain (Hymenoptera, Formicidae). Entomologist 101:236-240.

Yashiro, T.; Matsuura, K.; Guénard, B.; Terayama, M.; Dunn, R. R. 2010. On the evolution of the species complex Pachycondyla chinensis (Hymenoptera: Formicidae: Ponerinae), including the origin of its invasive form and description of a new species. Zootaxa 2685:39-50. PDF

Yasumatsu, K. 1935. Further notes on the hymenopterous fauna of the Yaeyama Group. Annotationes Zoologicae Japonenses 15:33-45. PDF

Notes: Ants pp. 34, 36.

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. 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. 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. 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. 1942. On the vertical distributions of ants on Mt. Hikosan, Kyushu. [In Japanese.]. Mushi 14:102. 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.; 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.; 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.; 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.