Yabe M., Matsuura K., Arai R., 1991: Sea fishes collected in northern Hokkaido, Japan. 14 pp. Memoirs of the National Science Museum 24: 117-130.

 Yadav J. S., Pillai R. K., Yadav A. S., 1990: Karyotypic study of some scarab beetles with comments on phylogeny (Coleoptera: Scarabaeoidea). 11 pp. Elytron 4: 41-51.

 Yahara T., 1986: Distribution of sexual and agamospermous populations od Boehmeria sylvestrii and its three relatives (Urticaceae). 12 pp. Memoirs of the National Science Museum 19: 121-132.

 Yakhontov V. V., 1969: Ekologiya nasekomykh. 488 pp. 

 Yakovenko N.S., 2000: New for the fauna of Ukraine rotifers (Rotifera, Bdelloidea) of Adinetidae and Habrotrochidae families. 9 pp. Vestnik zoologii 34(1-2): 11-19.

 Yamaguchi B., 1988: Human skeletal remains of the Epi-Jomon period from the Chatsu Cave IV Site, the Shakotan Peninsula, Hokkaido. 7 pp. (in Japanese). Memoirs of the National Science Museum 21: 229-235.

 Yamaguchi B., Ishida H., Matsumura H., 1993: On the skeletal remains of the Kurile Ainu collected by the Late Kingo Hayashi. 19 pp. Memoirs of the National Science Museum 26: 151-169.

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 Yamaguchi B., Yoshiyuki M., Matsukuma A., Nakaike T., Katoda Y., Matsubara S., Tomida Y., Mizoguchi Y., 1989: Preface to the Natural History Researches of Amani Shoto and Tokara Retto. 5 pp. (in Japanese). Memoirs of the National Science Museum 22: 1-5.

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 Yang D., Yang C.-K., 1993: Notes on the Chinese Eutropha (Insecta, Diptera, Chloropidae). 4 pp. Spixiana 16: 237-240.

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 Yarrow I. H. H., 1939: Observations on Asilus crabroniformis (L.) (Diptera). 1 pp. 

 Yarrow I. H. H., 1941: Melitta leporina (Panz.) and Nomada flavopicta (Kirby) (Hym., Apidae). 2 pp. [M43] 

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 Yarrow I. H. H., 1955: Andrena combinata Christ (Hym., Apidae): a bee new to Britain. 2 pp. [M43] 

 Yarrow I. H. H., 1971: The author and date of certain subgeneric names in Bombus Latreille (Hymenoptera: Apidae). 3 pp. 

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 Yasumatsu K., 1958: A new addition to the genera of the Sclerogibbide (Hymenoptera). 5 pp. 

 Yata O., 1981: Comparative morphology of the pupal forewing tracheation in some Japanese species of the family Pieridae (Lepidoptera). 13 pp. Kontyu, Tokyo 49(2): 245-257.

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 Yefremova Z. A., Vidal S., 1997: A new species of Hyssopus Girault, 1916 from Germany (Hymenoptera, Chalcidoidea: Eulophidae). 4 pp. [M23] Entomofauna 18/24: 401-404.

 Yeh H., 1988: The early records of fossil turtles from China. 6 pp. [REP 106] Acta zoologica cracoviensia 31/12: 451-456.

 Yelamos T., Gomy Y., 1990: Aportación al conocimiento de los Cyclobacanius Müller Afrotropicales (Coleoptera: Histeridae: gen. Bacanius Leconte). 7 pp. [16037] Elytron 4: 185-191.

 Yélamos T., Gomy Y., 1992: Aportación al conocimiento de los Cyclobacanius Müllerr afrotropicales (Coleoptera: Histeridae) (II). 36 pp. [16038] Elytron 6: 163-198.

 Ying-Tou Mao, 1949: The species of ichneumon-flies of the genus Cardiochiles occurring in America North of Mexico. 40 pp. 

 Yokoyama K., 1993: Petrological study of the Cretaceous to Paleogene sandstones in the Shiranuka Area, eastern Hokkaido, Japan. 13 pp. Memoirs of the National Science Museum 26: 7-19.

 Yorozuya H., 2006: Effects of parasitoids on a mycophagous drosophilid community in northern Japan and an evaluation of the disproportionate parasitism hypothesis. 10 pp. Entomol. Sci. 9(1): 13-22.

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 Yoshimi S., Doi Y., 1989: Japanese Gasteromycete notes (1). 13 pp. (in Japanese). Memoirs of the National Science Museum 22: 29-41.

 Yoshitake H., Masaoka K., Satô S., Nakajima A., Kamitani S., Yukawa J., Kojima H. 2001: Occurrence of Rhynchophorus ferrugineus (Coleoptera: Dryophthoridae) on Nokonoshima Island, southern Japan and its possible invasion further north. 6 pp. (in English). Kyushu Plant Protection Research 47: 145-150.

 Yoshiyuki M., 1987: The phylogenetic status of Mogera tokudae Kuroda, 1940 on the basis of body skeletons. 11 pp. (in Japanese). Memoirs of the National Science Museum 19: 203-213.

 Yoshiyuki M., 1988: Notes on the Yezo Raccoon-dog, Nyctereutes procyonoides albus from Okushiri Island off Hokkaido, Japan. 9 pp. (in Japanese). Memoirs of the National Science Museum 21: 189-197.

 Yoshiyuki M., Hattori S., Tsuchiya K., 1989: Taxonomic analysis of two rare bats from the Amami Islands (Chiroptera, Molossidae and Rhinolophidae). 11 pp. Memoirs of the National Science Museum 22: 215-225.

 Yoshizaki M., 1988: Marine algea on the coast of Shiranuka, Aomori Prefecture, with special reference to algal flora of the Tsugaru Strait. 10 pp. (in Japanese). Memoirs of the National Science Museum 21: 61-70.

 Yoshizaki M., Tanaka J., 1986: Biogeography of marine algae on the Japan sea coast of Japan, with special reference to algal flora of the Noto Peninsula. 12 pp. (in Japanese). Memoirs of the National Science Museum 19: 109-120.

 Yosii R., 1958: On some remarkable Collembola from Japan. 5 plates, 2 figures, 25 pp. Acta zoologica cracoviensia 2/29: 681-704.

 Yosii R., 1961: Cryophilous insects of the Niigata Prefecture, II. Collembola. 7 pp. 

 You L., Zhou Z., 1991: A new species of Bracteodes attacking Apis cerana Fabricius 1793 (Hymenoptera, Braconidae, Euphorinae). 7 pp. Entomofauna 12/13: 157-164.

 Young C. W., Gelhaus J. K., 1992: Leptotarsus (Longurio) byersi, a new flightless crane fly from Ecuador (Diptera: Tipulidae). 9 pp. [DIP 3944] Acta zoologica cracoviensia 35(1): 97-105.

 Young D. A., Beirne B. P., 1958: A taxonomic revision of the leafhopper genus Flexamia and a new related genus (Homoptera, Cicadellidae). 53 pp.