All (in this database) Other insects list (Scientific names): Part O
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- obductus (Hartig, 1837) (Pachynematus)
- oberti (Kolenati, 1856) (Stephanitis)
- obesus (Ashmead, 1902) (Gelis)
- obesus Brunner von Wattenwyl, 1878 (Poecilimon)
- obesus Lindqvist, 1959 (Amauronematus), see Amauronematus rufomacula
- obliqua Thomson, 1877 (Trioza), see Trioza chenopodii
- obliquus (Cholodkovsky, 1896) (Mindarus)
- obliquus Horvath, 1888 (Cymus), see Cymus aurescens
- obliterata McLachlan, 1863 (Rhyacophila)
- obliteratus Wesmael, 1855 (Ichneumon)
- oblonga (Mordvilko, 1901) (Macrosiphoniella)
- oblongus (von Heyden, 1837) (Symydobius)
- oblongus Schrank, 1802 (Ichneumon)
- obscura Zetterstedt, 1838 (Nomada)
- obscura Nylander, 1848 ( Mutillaeuropaea)
- obscura (Fabricius, 1775) (Corynis)
- obscura (Zetterstedt, 1840)¹ (Isoperla)
- obscura Alfken, 1897 (Megachile), see Megachile analis
- obscura Fabricius, 1775 (Tenthredo), see Corynis obscura
- obscurata (McLachlan, 1876) (Annitella)
- obscuratus (Hartig, 1837) (Monoctenus)
- obscuratus Hartig, 1837 (Lophyrus), see Monoctenus obscuratus
- obscurella (Zetterstedt, 1838) (Scoloposcelis)
- obscurella (Boheman, 1847) (Javesella)
- obscurellus (Fallén, 1829) (Phoenicocoris)
- obscuricornis Kieffer, 1906 (Anteon), see Anteon brachycerus
- obscuripennis (Schenck, 1857) (Tachysphex)
- obscuripes Horstmann, 1986 (Gelis)
- obscuritarsis Dalla Torre, 1902 (Ichneumon)
- obscurum (Koch, 1855) (Uroleucon)
- obscurus (Geoffroy, 1785) (Ichneumon)
- obscurus Lindqvist, 1962 (Amauronematis), see Amauronematus pacificus
- observandus Heinrich, 1951 (Ichneumon)
- obsoleta Klug, 1814 (Tenthredo)
- obsoleta (Hagen, 1864) (Agrypnia)
- obtrusum (Hagen, 1861) (Sympetrum)
- obtusifrons (Stål, 1853) (Paramesus)
- obtusifrons Nylander, 1848 (Nomada)
- obtusiventris Schiødte, 1837 (Priocnemis), see Priocnemis agilis
- obtusus Lindqvist, 1957, see Nematus truncus
- occidentalis (Cresson, 1879) (Orussus)
- occidentis Hilpert, 1992 (Ichneumon)
- occulata (Eaton, 1873) (Hydroptila)
- ocellaris (Fallén, 1806) (Errastunus)
- Ochetostethus Fieber, 1861 (Cydnidae)
- ochracea (Curtis, 1825) (Oecetis)
- ochrifrons Vilbaste, 1973 (Limotettix)
- ochripes Curtis, 1834 (Agapetus)
- ochroleucus (Stephens, 1835) (Heptamelus)
- ochropodus (Klug, 1814) (Heterarthrus)
- ochropus (Gmelin, 1790) (Arge)
- ochropus Gmelin, 1790 (Tenthredo), see Arge ochropus
- ochrostoma Kirby, 1802, see Nomada striata
- ocreata (Christ, 1791) (Andrena)
- Odonata (Insecta:class)
- odontogaster (Zetterstedt, 1828) (Gerris)
- Odynerus Latreille, 1802 (Eumenidae)
- Oecetis McLachlan, 1877 (Leptoceridae)
- Oeciacus Stål, 1873 (Cimicidae)
- okaensis Zachvatkin, 1948 (Streptanus)
- oleae (Bernhard, 1782) (Saissetia)
- oleracea (Linnaeus, 1758) (Eurydema)
- Oliarius Stål, 1862 (Cixiidae)
- oligospilus Förster, 1854 (Nematus)
- Oligostomis Kolenati, 1848 (Phryganeidae)
- Oligotricha Rambur, 1842 (Phryganeidae)
- olivacea Klug, 1814 (Tenthredo)
- Olochrysis Lichtenstein, 1876 (Chrysididae), see Chrysura
- Omalus Panzer, 1801 (Chrysididae)
- omissa Valkeila, 1954 ( Andrenapubescens)
- omissa (Bischoff, 1931) (Dolichovespula)
- omissa (Förster, 1844) (Tenthredo)
- Ommatidiotus Spinola, 1839 (Issidae)
- Omocestus Bolivar, 1878 (Acrididae)
- Oncodelphax Wagner, 1963 (Delphacidae)
- Oncopsis Burmeister, 1838 (Cicadellidae)
- Oncotylus Fieber, 1858 (Miridae)
- Onychogomphus Selys-Longchamps, 1854 (Gomphidae)
- Onycholyda Takeuchi, 1938 (Pamphiliinae)
- opaca Alfken, 1913 (Nomada)
- opaca (Fabricius, 1775) (Mesoneura)
- opaca Lindqvist, 1955 (Pristiphora)
- opacifrons Hellén, 1935, see Anteon tripartitus
- opacula (Zetterstedt, 1839) (Saldula)
- opacum Saarinen, 1946 (Trichiosoma), see Trichiosoma vitellinae
- opacus (Zetterstedt, 1840) (Chlamydatus)
- opacus (Scholtz, 1847) (Ochetostethus)
- opacus Tischbein, 1881 (Ichneumon)
- operosus Schwarz, 2002 (Gelis)
- Ophiogomphus Selys-Longchamps, 1854 (Gomphidae)
- Ophiola Edwards, 1922 (Cicadellidae)
- Ophion (Ichneumonidae)
- ophiopsis Linnaeus, 1758 (Raphidia)
- opinata (Tournier, 1890) (Arachnospila)
- ora Kincaid, 1900 (Pontania)
- ora (Eupontania), see Pontania ora
- oratoria (Iris)
- orbelicus Pancic, 1883 (Poecilimon)
- orbitalis Forsius, 1918 (atra var. ), see Tenthredo atra
- Orchesella (Collembola)
- orchidearum (Westwood, 1879) (Cerataphis)
- ordinaria (Ribaut, 1936) (Zygina)
- ordinarius Priesner, 1966 (Episyron), see Episyron albonotatus
- oredonensis Cassagnau, 1964 (Orchesella)
- orientalis Stach, 1960 (Orchesella)
- orientalis (Blatta)
- orientalis Linnaeus, 1771 (Vespa)
- orientalis Maa, 1949 ( Urocerusgigas)
- origani Zachvatkin, 1948 (Eupteryx)
- Orius Wolff, 1811 (Anthocoridae)
- ornata (Melichar, 1900) (Cicadula)
- ornata Fabricius, 1790, see Cerceris rybyensis
- ornatula (Klug, 1807) (Stelis)
- ornatula auct. nec. McLachlan, 1878 (Hydropsyche), see Hydropsyche contubernalis
- ornatulus (Thomson, 1884) (Gelis)
- ornatum (Selys, 1850) (Coenagrion)
- ornatus Laing, 1932 (Myzus)
- ornatus (Schmidt, 1849) (Poecilimon)
- orni (Cicada)
- Orthetrum Newman, 1833 (Libellulidae)
- Orthezia Bosc d'Antic, 1784 (Ortheziidae)
- Ortheziidae (Coccodea)
- Orthocephalus Fieber, 1858 (Miridae)
- orthochila (Fieber, 1859) (Saldula)
- Ortholomus Stål, 1872 (Lygaeidae)
- Orthonotus Stephens, 1829 (Miridae)
- Orthops Fieber, 1858 (Miridae)
- Orthoptera (Insecta:class)
- Orthotrichia Eaton, 1873 (Hydroptilidae)
- Orthotylus Fieber, 1858 (Miridae)
- Orussidae (Orussoidea)
- Orussoidea (Symphyta)
- Orussus Latreille, 1796 (Orussidae)
- Oryssus Fabricius, 1798 (Orussidae), see Orussus
- osiliensis Mierzejewski, 1913 (Aeshna)
- Osmia Panzer, 1806 (Megachilidae)
- osmiae Thomson, 1879, see Chrysura hirsuta
- ossianilssoni Nuorteva, 1948 (Empoasca)
- ossiannilssoni Hille Ris Lambers, 1949 (Wahlgreniella)
- ossiannilssoni Lindberg, 1953 (Macrosteles)
- ostarrichi Schwarz, 1996 (Gelis)
- ostentator Heinrich, 1978 (Ichneumon)
- ostentus Brues, 1908 (Paremphytus)
- ostreaformis (Curtis, 1843) (Quadraspidiotus)
- ovalis Lepeletier & Brullé, 1835 (Crossocerus)
- ovata Dahlbom, 1854 (Holopyga)
- ovata (Linnaeus, 1761) (Eriocampa)
- ovatula (Kirby, 1802) (Andrena)
- Ovatus van der Goot, 1913 (Aphidinae)
- ovina Klug, 1810 (Andrena), see Andrena vaga
- oviventris (Wesmael, 1836) (Ancistrocerus)
- oviventroides Hinz, 1975 (Ichneumon)
- Oxybeloides Radoszkowski, 1877 (Sphecidae), see Belomicrus
- Oxybelus Latreille, 1796 (Sphecidae)
- Oxycarenus Fieber, 1829 (Lygaeidae)
- Oxyethira Eaton, 1873 (Hydroptilidae)
- Oxygastra (Corduliidae)
- Oxytrichia Mosely, 1939 (Hydroptilidae)
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Markku Savela