Omoloye A. A., 2010: Effects of genotype variation in the cultivated rice species on the biology and galling characteristics of the African rice gall midge, Orseolia oryzivora (Diptera: Cecidomyiidae). 8 pp. Entomological Science 13(3): 320-327.

 Omoloye A. A., Vidal S., 2007: Abundance of 24-methylenecholesterol in traditional African rice as an indicator of resistance to the African rice gall midge, Orseolia oryzivora Harris & Gagné. 9 pp. Entomological Science 10(3): 249-257.

 Ondráček J., Rupeš V., Žďárek J., Lineva V. A., 1976: Lethal effects of microwaves on strains of Musca domestica, having different resistance to insecticides. 3 pp. 

 Ono H., 1978: Description of a new Odagmia-species, O. nishijimai n. sp. (Diptera, Simuliidae) from Japan. 9 pp. Kontyu, Tokyo 46(1): 43-51.

 Ono H., 1980: Some new species of black flies (Diptera, Simullidae) from Hokkaido, Japan. 29 pp. 

 Oosterbroek P., 1994: Notes on western Palaearctic species of the Tipula (Yamatotipula) lateralis group, with the description of a new species from Turkey (Diptera: Tipulidae). 7 pp. [DIP 6559] European Journal of Entomology 91(4): 429-435.

 Oppenoorth F. J., Dresden D., 1953: Selection of a bhc-resistant strain of Drosophila melanogaster Mg. 6 pp. 

 Ormerod E. A., 1886: Cecidomyia destructor, Say, in Great Britain. 6 pp. 

 Országh I., 1969: Contribution to the occurrence of the species of genus Culicoides Latreille, 1809 (Diptera, Ceratopogonidae) on the territory of Czechoslovakia. 6 pp. 

 Országh I., 1969: New species of genus Culicoides Latreille, 1809 (Diptera, Ceratopogonidae). 9 pp. Annotationes Zoologicae et Botanicae 59: 1-9.

 Országh I., 1974: Five species of Culicoides latreille, 1809 (Diptera, Ceratopogonidae) new for Czechoslovakia. 7 pp. 

 Országh I., 1992: Pakomáriky rodu Culicoides (Diptera, Ceratopogonidae) okolia československého úseku Dunaja. 13 pp. 

 Országh I., Bakošová A., 1982: Species of the genus Forcipomyia (Diptera, Ceratopogonidae) occurring in Czechoslovakia. 5 pp. 

 Országh I., Minář J., 1986: Biting midges of the genus Culicoides (Diptera, Ceratopogonidae) of South-Western Bohemia. 6 pp. (in Slovakian). 

 Országh I., Okáli I., 1978: The history of dipterology in Slovakia in the 18th and 19th century (Abstract). 2 pp. (in Slovakian). 

 Országh I., Trpiš M., 1970: A contribution to the knowledge of little known species of genus Culicoides Latreille (Diptera, Ceratopogonidae) from Czechoslovakia. 11 pp. 

 Ortiz I., 1954: Description de dos nuevas especies del genero Phlebotomus Rondani (Diptera, Psychodidae) de Venezuela. 20 pp. 

 Ortiz I., 1965: Contribucion al estudio de los flebotomos americanos del grupo Cayennensis con la descripcion de una nueva especie: Phlebotomus yencanensis n. sp. (Diptera: Psychodidae). 7 pp. 

 Ortiz I., 1965: Contribucion al estudio de los flebotomos americanos del grupo Sanguinarius con la descripcion de una nueva especie: Phlebotomus scorzai n. sp. (Diptera: Psychodidae). 15 pp. 

 Ortu S., Floris I., 1990: Osservazioni sul cromotropismo di alcune specie di Ditteri Sirfidi (Diptera Sirphidae). 7 pp. 

 Osborn H., 1898. The Hessian fly in the United States. 52 pp. 

 Osten Sacken C. R., 1882: Bemerkungen zu Prof. Weyenbergh’s Arbeit. 2 pp. 

 Osten Sacken C. R., 1868: Description of a new species of Culicidae. 2 pp. 

 Osten Sacken C. R., 1873: Chapter X. Report upon the collection of Diptera made in portion of Colorado and Arizona. 3 pp. 

 Osten Sacken C. R., 1878: Bemerkungen über Blepahroceriden. Ein Nachtrag zur "Revision" dieser Familie von Professor Dr. Loew. 12 pp. 

 Osten Sacken C. R., 1880: Dr. F. Müller’s discovery of a case of female dimorphism among Diptera. 3 pp. 

 Osten Sacken C. R., 1882: On Professor Brauer’s paper: Versuch einer Charackeristik der Gattungen der Notacanthen. 1882. 18 pp. 

 Osten Sacken C. R., 1884: XXIV. – Facts concerning the importation or non-importation of Diptera into distant countries. 8 pp. 

 Osten Sacken C. R., 1886: Characters of the larvae of Mycetophilidae. 30 pp. 

 Osten Sacken C. R., 1887: On Mr. Portchinski’s publications on the larvae of Muscida including a detailed abstract of his last paper: Comparative biology of the necrophagous and coprophagous larvae. 11 pp. 

 Osten Sacken C. R., 1887: Some North American Tachinae. 6 pp. 

 Osten Sacken C. R., 1887: Studies on Tipulidae. Part II. Review of the published genera of the Tipulidae brevipalpi. 80 pp. 

 Osten Sacken C. R., 1890: Hilarimorpha Schin. ins a Leptid. 2 pp. 

 Osten Sacken C. R., 1891: Synopsis of the described genera and species of the Blepharoceridae. 10 pp. 

 Osten Sacken C. R., 1893: Explanatory notice of my views on the sub-orders of Diptera. 2 pp. 

 Osten Sacken C. R., 1894: On the atavic index-characters with some remarks about the classification of the Diptera. 8 pp. 

 Osten Sacken C. R., 1894: On the New Zealand Dipterous fauna. 4 pp. 

 Osten Sacken C. R., 1895: Contributions to the study of Liponeuridae Loew (Blepharoceridae Loew, olim). 17 pp. 

 Osten Sacken C. R., 1895: Eristalis tenax in chinese and japanese literature. 28 pp. 

 Osten Sacken C. R., 1895: XIX. Remarks on the homologies and differnces between the first stages of Pericoma, Hal., and those of the new Brazilian species. 5 pp. 

 Osten Sacken C. R., 1896: A new genus of Cyrtidae (Dipt.) from New Zealand. 3 pp. 

 Osten Sacken C. R., 1896: Bibiliograhische und theilweise psychologische Untersuchung übe die zwei Ausgaben der Erstlingsarbeit von H. Loew: Ueber die Posener Dipteren. 6 pp. 

 Osten Sacken C. R., 1896: Notice on the terms tegula, antitegula, squama and alula, as used in Dipterology. 4 pp. 

 Osten Sacken C. R., 1897: Identification of two genera of Nemestrinidae. 7 pp. 

 Osten Sacken C. R., 1900: Notice on the synonymy of Anopheles maculipennis, Meigen. 2 pp. 

 Osten Sacken C. R., 1902: The position of Phora in the system of Diptera. 2 pp. 

 Osten Sacken C. R., : Report on the Diptera collected by Lieut. W. L. Carpenter in Colorado during the summer of 1873. 6 pp. 

 Ostroverchova G. P., 1982: Zoogeografičeskaja charakteristika fauny micetofiloidnych komarov Zapadnoj Sibiri. 5 pp. 

 Otter G. W. M. A., 1938: On the morphology of the larvae of three species of Cecidomyidae (Diptera) from knapweed (Centaurea) flowers. 30 pp. The Transactions of the Royal Entomological Society of London 87(2): 39-68.

 Otter G. W., 1934: On the early stage of Lestopdiplosis alvei Barnes (Diptera, Cecidomyidae), especially in relation to the larval head capsule. 12 pp.