Novák D., Potůček V., 1982: Smoke of synthetic pyrethroids against mosquitoes Culex pipiens. 3 pp.
 
ASC 56364
Novák V., 1959: Další nová muchnička podčeledi Gymnopaidinae z ČSR, Twinnia tatrensis sp. n. (Diptera, Simuliidae). 4 pp. [DIP 2437] Acta Societatis entomologicae Cechosloveniae 56: 364-367.
 
PPE 30367
Nowakowski J. T., 1960: Studia nad muchówkami minujacymi z rodziny Agromyzidae (Diptera). 5. Nowy gatunek Agromyza Fall. z Jugoslawii. 13 pp. [DIP 2440] Polskie Pismo Entomologiczne 30: 367-379.
 
PPE 32225
Nowakowski J. T., 1962: Studia nad muchówkami minujacymi z rodziny Agromyzidae (Diptera). 7. Nowy gatunek Photomyza Fall. z Tatr. 10 pp. [DIP 2442] Polskie Pismo Entomologiczne 32: 225-234.
 
PPE 44559
Nowosad A., 1974: Nysteribia kolenatii Theodor et Moscona i Penicillidia monoceros Speiser (Nycteribiidae) w Polsce. 11 pp. [DIP 2444] [M15]
 
PPE 57263
Nowosad A., 1987: Materialy do znajomosci Nycteribiidae (Diptera, Pupipara) Polski zachodniej i pólnocno-zachodniej. 14 pp. [DIP 2446] Polskie Pismo Entomologiczne 57: 263-276.
 
NBE 46011
Offenberger M., Klarenberg A. J., 1997: Hymenopteran parasitoids of Drosophila breeding in decaying herbage (Diptera: Drosophilidae). 9 pp. [DIP 2448] Nachrichtenblatt der Bayerischen Entomologen 46(1/2): 11-19.
 
DIP 2451
Okada T., 1974: Drosophilidae (Diptera) from Korea. 7 pp. Ann. Hist.-nat. Mus. Nat. Hung. 66: 269-275.
 
DIP 2454
Okáli I., 1986: List of the type specimens in the collections of the Slovak national museum – institute of natural history, Bratislava: Insecta, Diptera. 2 pp.
 
63004
Okely E. F., 1974: Description of the puparia of twenty-three British species of Sphaeroceridae (Diptera, Acalyptratae). 16 pp.
 
DIP 4442
Oldenberg L., 1901: Blepahrocera fasciata Westw. (Dipt.). 8 pp.
 
DIP 2463
Oldenberg L., 1916: Einige Dolichopodiden meiner Ausbeute (Dipt.). 12 pp.
 
DIP 2464
Oldenberg L., 1924: Zur Kenntnis der Asiliden-Gattung Lasiopogon (Diptera). 8 pp. [M15] [M40]
 
DIP 2465
Oldenberg L., 1927: Anthomyza fasciipennis sp. n. (Dipt.). 3 pp.
 
63624
Oldroyd H., 1937: Bombyliidae from Chile and Western Argentine (Part II). 11 pp.
 
DIP 5783
Oldroyd H., 1949: Diptera. Introduction, and keys to families. 4 pp.
 
DIP 7068
Oldroyd H., 1960: Diptera Asilidae. Mission zoologique de l’I.R.S.A.C. en Afrique orientale. (P. Basilewsky et N. Leleupt, 1957). XXIX. 5 pp.
 
DIP 7069
Oldroyd H., 1960: Some Tabanidae (Dipt.) from Madagascar. 6 pp. [M42]
 
DIP 7070
Oldroyd H., 1961: Ergebnisse der Deutschen Afghanistan-Expedition 1956 der Landessammlungen für Naturkunde Karlsruhe. 4 pp.
 
DIP 6881
Oldroyd H., 1963: The 3rd Danish Expedition to Central Asia. Zoological results 32. Asilidae (Insecta) from Afghanistan. 5 pp. [M42]
 
DIP 2473
Oldroyd H., 1966: Notes on Coenomyia Latreille (Diptera: Coenomyiidae). 10 Figs., 11 pp. [B18]
 
BTE 16953
Oldroyd H., 1966: Notes on Coenomyia Latreille (Diptera: Coenomyiidae). 10 Figs., 11 pp. [DIP 2473] [B18] [M15]
 
63626
Oldroyd H., 1968: New Therevidae from Argentina. 9 pp.
 
DIP 7071
Oldroyd H., 1972: Asilidae (Diptera) d’Espagne (Pyrénées et Montes Universales). 4 pp. [M42]
 
DIP 2479
Olejníček J., 1982: Příspěvek k poznání druhů rodu Medetera (Diptera, Dolichopodidae) v ČSSR. 3 pp. [ZCS 18041] [M40]
 
KLA 32129
Olejníček J., Barták M., 1996: Faunistic records from the Czech Republic – 41 Diptera: Dolichopodidae. 2 pp. [M50] Klapalekiana 32(1-2): 129-130.
 
EPR 28127
Olejníček J., Kozánek M., 1997: Systenus slovaki sp. nov. (Diptera, Dolichopodidae) from Korea. 3 pp. Entomological Problems 28(2): 127-129.
 
KLA 32200
Olejníček J., Mocek B., 1996: Faunistic records from the Czech Republic – 47. Diptera: Dolichpodidae. 1 pp. [M54] Klapalekiana 32(3-4): 200.
 
DIP 2485
Olejníček J., Rozkošný R., 1978: Some species of Dolichopodidae (Diptera) new to the fauna of Czechoslovakia. 9 pp.
 
SPX 23117
Oliveira S. J. de, 2000: A new, non-marine species of the genus Thalassomya Schiner, 1856 (Insecta, Diptera, Chironomidae, Telmatogetoninae). 4 pp. Spixiana 23(2): 117-120.
 
ASC 61284
Olsufiev N. G., Moucha J., Chvála M., 1964: Chrysozona scutellata sp. n. aus Mitteleuropa (Diptera, Tabanidae). 3 pp. [DIP 2493] Acta Societatis entomologicae Cechosloveniae 61: 284-286.
 
SPX 23121
Orendt C., 2000: Chironomids of small Alpine water bodies (springs, spring brooks, pools, small lakes) of the northern Calcareous Alps (Insecta, Diptera, Chironomidae). 8 pp. Spixiana 23(2): 121-128.
 
DIP 2503
Országh I., Bakošová A., 1982: Species of the genus Forcipomyia (Diptera, Ceratopogonidae) occurring in Czechoslovakia. 5 pp.
 
DIP 2504
Országh I., Minář J., 1986: Biting midges of the genus Culicoides (Diptera, Ceratopogonidae) of South-Western Bohemia. 6 pp. (in Slovakian).
 
DIP 4459
Osten Sacken C. R., 1878: Bemerkungen über Blepahroceriden. Ein Nachtrag zur "Revision" dieser Familie von Professor Dr. Loew. 12 pp. [M42]
 
61153
Osten Sacken C. R., 1882: On Professor Brauer’s paper: Versuch einer Charackeristik der Gattungen der Notacanthen. 1882. 18 pp. [M58]
 
61155
Osten Sacken C. R., 1886: Characters of the larvae of Mycetophilidae. 30 pp. [M58]
 
61157
Osten Sacken C. R., 1891: Synopsis of the described genera and species of the Blepharoceridae. 10 pp. [M58]
 
62265
Osten Sacken C. R., 1895: Contributions to the study of Liponeuridae Loew (Blepharoceridae Loew, olim). 17 pp.
 
DIP 3029
Osten Sacken C. R., 1897: Identification of two genera of Nemestrinidae. 7 pp. [M40]
 
DIP 3031
Osten Sacken C. R., 1902: The position of Phora in the system of Diptera. 2 pp. [M40]
 
DIP 4245
Ouchi Y., 1939: Contributiones ad cognitionem insectorum Asiae orientalis. VII. A new species of Megarhinus mosquito from Amami-Oshima, the southern Japan. 4 pp.
 
DIP 4246
Ouchi Y., 1939: Diptera Sinica. Celyphidae. I. On a new species of genus Spaeniocelyphus from Eastern China. 3 pp.
 
DIP 4849
Ovazza M., 1962: Une nouvelle espece de Tabanus (Diptera: Tabanidae) trouvée en AFrique occidentale: Tabanus moreli, n. sp. 6 pp.
 
SPX 23259
Paggi A. C., Suarez D. A., 2000: Ablabesmyia reissi, spec. nov., a new species of Tanypodinae from Rio Negro province, Argentina, with descriptions of the adult female and preimaginal stages (Insecta, Diptera, Chironomidae). 8 pp. Spixiana 23(3): 259-266.
 
61884
Palm J., 1875: Beitrag zur Dipteren-Fauna Oesterreichs. 12 pp. [M58]
 
62162
Palmén E., 1955: Diel periodicity of pupal emergence in natural populations of some Chironomids (Diptera). 30 pp.
 
61885
Pandazis G., 1935: La faune des Culicides de Gréce. 32 pp.
 
FEH 24333
Papp L., 1971: A new species of Drosophila from Hungary (Dipt., Drosophilidae). 6 pp. [DIP 2552] Folia Entomologica Hungarica (S.N.) 24: 333-338.
 
FEH 24427
Papp L., 1971: Néhány faunistikai és ökológiai adat marhalepényekben fejlödö legyeink ismeretéhez (Dipt.). 15 pp. [60980] [DIP 2553] Folia Entomologica Hungarica (S.N.) 24: 427-441.