| Subgenus | Orthosia (Cororthosia) Berio, 1980
| 8 | Species |
| Subgenus | Orthosia (Microrthosia) Berio, 1980
| 1 | Species |
| Subgenus | Orthosia (Monima) Hübner, 1821
| 14 | Species |
| Subgenus | Orthosia (Orthosia) Ochsenheimer, 1816
| 6 | Species |
| Subgenus | Orthosia (Semiophora) Stephens, 1829
| 4 | Species |
| Species | Orthosia achsha Dyar, 1904 ⇒ Orthosia pulchella
| | |
| Species | Orthosia acutangula Smith, 1911
| | |
| Species | Orthosia addenda Smith, 1820 ⇒ Orthosia pulchella
| | |
| Species | Orthosia advena
| | |
| Species | Orthosia aggressa
| | |
| Species | Orthosia agravens Barnes & McDunnough, 1911 ⇒ Orthosia mys
| | |
| Species | Orthosia albescens Cockayne, 1952
| | |
| Species | Orthosia albiceps Hampson, 1894
| | |
| Species | Orthosia albomarginata Cockayne, 1952
| | |
| Species | Orthosia algula Smith, 1911 ⇒ Orthosia pulchella
| | |
| Species | Orthosia alia
| | |
| Species | Orthosia alishana Sugi, 1986
| | |
| Species | Orthosia alurina Smith, 1902 Flat cardiapod, Gray Quaker, Gray Quaker Moth | | |
| Species | Orthosia ambigua Hübner, 1827
| | |
| Species | Orthosia amicta Donzel, 1848
| | |
| Species | Orthosia angustipennis Matsumura, 1926
| | |
| Species | Orthosia angustus Haworth, 1803
| | |
| Species | Orthosia annulimacula Smith, 1891 Lizard beetles | | |
| Species | Orthosia aoyamensis Matsumura, 1926
| | |
| Species | Orthosia apicata Smith, 1911 ⇒ Orthosia erythrolita
| | |
| Species | Orthosia ariuna Hreblay, 1991
| | |
| Species | Orthosia arthrolita Harvey, 1874
| | |
| Species | Orthosia askoldensis Staudinger, 1892 ⇒ Orthosia (Semiophora) gothica
| 2 | Subspecies |
| Species | Orthosia atra Tutt, 1892
| | |
| Species | Orthosia atriluna Ronkay & Ronkay, 2000
| | |
| Species | Orthosia augur Fabricius, 1775
| 5 | Subspecies |
| Species | Orthosia aurifera
| | |
| Species | Orthosia bastula Schaus, 1906
| | |
| Species | Orthosia behrensiana Grote, 1875
| | |
| Species | Orthosia benepicta Köhler, 1947
| | |
| Species | Orthosia bicolor Lempke, 1964
| | |
| Species | Orthosia biconifer Warren, 1910
| | |
| Species | Orthosia bimaculata Lempke, 1964
| | |
| Species | Orthosia bimaculatus Haworth, 1803
| | |
| Species | Orthosia blidaënsis Stertz, 1915
| | |
| Species | Orthosia boursini Rungs, 1972
| 2 | Subspecies |
| Species | Orthosia brevipennis Lempke, 1964
| | |
| Species | Orthosia breviuscula Walker, 1865
| | |
| Species | Orthosia brucei Smith, 1910 ⇒ Orthosia hibisci
| | |
| Species | Orthosia brunnea Tutt, 1892
| | |
| Species | Orthosia c-nigrum Goeze, 1781
| | |
| Species | Orthosia caecimacula Denis & Schiffermüller, 1775
| | |
| Species | Orthosia caerulescens Tutt, 1892
| | |
| Species | Orthosia caliginosa Turati, 1911
| | |
| Species | Orthosia caloramica Barnes & McDunnough, 1911 ⇒ Orthosia mys
| | |
| Species | Orthosia cana Valle, 1940
| | |
| Species | Orthosia carnipennis Butler, 1878 Cherry leaf worm | | |
| Species | Orthosia castanea Sugi, 1986
| | |
| Species | Orthosia castaneipennis Hampson, 1894 ⇒ Harutaeographa cinerea
| | |
| Species | Orthosia cavernosa Eversmann, 1842
| | |
| Species | Orthosia cedemarki Bryk, 1948
| | |
| Species | Orthosia cedermarki Bryk, 1948
| | |
| Species | Orthosia centrifasciata Lempke, 1964
| | |
| Species | Orthosia cerasus
| | |
| Species | Orthosia chaldaica Boisduval, 1840
| | |
| Species | Orthosia circellaris Hufnagel, 1766
| | |
| Species | Orthosia circumducta Lederer, 1855
| | |
| Species | Orthosia circumscripta Hasbroek, 1915
| | |
| Species | Orthosia circumsignata Ford, 1955
| | |
| Species | Orthosia citima
| | |
| Species | Orthosia clausa Lempke, 1964
| | |
| Species | Orthosia collinita Esper, 1790 ⇒ Orthosia (Orthosia) incerta
| | |
| Species | Orthosia columbaris Lucas, 1893
| | |
| Species | Orthosia communicata Walker, 1865
| | |
| Species | Orthosia conflua Kiefer, 1913
| | |
| Species | Orthosia confluens Morrison, 1874 ⇒ Orthosia hibisci
| | |
| Species | Orthosia coniortota Filipjev, 1927
| | |
| Species | Orthosia conjuncta Lempke, 1940 ⇒ Spodoptera litura
| | |
| Species | Orthosia conspecta Wileman, 1914
| 2 | Subspecies |
| Species | Orthosia constabilis Wileman, 1911 ⇒ Orthosia lizetta
| | |
| Species | Orthosia consueta Herrich-Schäffer, 1852
| | |
| Species | Orthosia contacta Esper, 1790
| | |
| Species | Orthosia costijuncta Lempke, 1965
| | |
| Species | Orthosia cremnodes Lower, 1893
| | |
| Species | Orthosia dalmatina Wagner, 1909
| 1 | Subspecies |
| Species | Orthosia daubei Duponchel, 1838
| | |
| Species | Orthosia deleta Staudinger, 1882
| | |
| Species | Orthosia dentatelineata Lempke, 1940
| | |
| Species | Orthosia deprivata Walker, 1869
| | |
| Species | Orthosia desperata Smith, 1891
| | |
| Species | Orthosia diffinis Linnaeus, 1767
| | |
| Species | Orthosia diffusa Cockayne, 1952
| | |
| Species | Orthosia discomaculata Lempke, 1964
| | |
| Species | Orthosia disticha Grote, 1875
| | |
| Species | Orthosia donasa
| | |
| Species | Orthosia dukinfieldi Schaus, 1903
| | |
| Species | Orthosia ella Butler, 1878
| | |
| Species | Orthosia elongata Cockayne, 1951
| | |
| Species | Orthosia eriza Swinhoe, 1901 ⇒ Harutaeographa eriza
| | |
| Species | Orthosia erythrolita Grote, 1879
| | |
| Species | Orthosia erythrolitoides Strand, 1917
| | |
| Species | Orthosia estrigata Lempke, 1940
| | |
| Species | Orthosia evanida Butler, 1879
| | |
| Species | Orthosia expuncta
| | |
| Species | Orthosia extincta Heinrich, 1917
| | |
| Species | Orthosia faqiri Hreblay & Plante, 1994
| | |
| Species | Orthosia fasciata
| | |
| Species | Orthosia fasciculata Hampson, 1894
| | |
| Species | Orthosia fausta Leech, 1889
| | |
| Species | Orthosia feda Hreblay & Plante, 1994
| | |
| Species | Orthosia ferrigera Smith, 1894 Filefishes, Triggerfishes | | |
| Species | Orthosia ferrirena Draudt, 1924
| | |
| Species | Orthosia ferrosticta Hampson, 1894 ⇒ Harutaeographa ganeshi
| | |
| Species | Orthosia firma Hübner, 1809 ⇒ Orthosia (Cororthosia) opima Northern Drab | | |
| Species | Orthosia flavescens Lempke, 1964
| | |
| Species | Orthosia flaviannula Smith, 1899
| | |
| Species | Orthosia flavilinea Heinrich, 1917
| | |
| Species | Orthosia flavirena Moore, 1881
| | |
| Species | Orthosia flavolinea Richardson, 1958
| | |
| Species | Orthosia fluvilinea Matsumura, 1926 ⇒ Orthosia angustipennis
| | |
| Species | Orthosia fringata Smith, 1908 ⇒ Orthosia transparens
| | |
| Species | Orthosia fuscata Feichtenberger, 1965 ⇒ Orthosia (Orthosia) incerta
| | |
| Species | Orthosia fuscatus Haworth, 1803
| | |
| Species | Orthosia fuscus
| | |
| Species | Orthosia garmani Grote, 1879 Garman'S Quaker, Garmans Quaker, Garman´s Quaker | | |
| Species | Orthosia gemina Borkhausen, 1792
| | |
| Species | Orthosia geminatus Haworth, 1803
| | |
| Species | Orthosia gothicina Herrich-Schäffer, 1849 ⇒ Orthosia (Semiophora) gothica
| | |
| Species | Orthosia gratiosa Staudinger, 1882
| | |
| Species | Orthosia grisea Tutt, 1892
| | |
| Species | Orthosia griseor Strand, 1917
| | |
| Species | Orthosia griseovariegata Valle., 1940
| | |
| Species | Orthosia grisescens Hreblay & Ronkay, 1998
| | |
| Species | Orthosia gussata Smith, 1895
| | |
| Species | Orthosia habeleri Wiesmair, Shirvani & Ronkay, 2020
| | |
| Species | Orthosia haematidea Duponchel, 1827
| | |
| Species | Orthosia hamata Feichtenberger, 1965
| | |
| Species | Orthosia hamifera Grote, 1888 ⇒ Orthosia transparens
| | |
| Species | Orthosia harutai Yoshimoto, 1993
| | |
| Species | Orthosia heckendorni de Bros, 1952
| | |
| Species | Orthosia helvola Linnaeus, 1758
| | |
| Species | Orthosia hepatica Barnes & McDunnough, 1911 ⇒ Orthosia pulchella
| | |
| Species | Orthosia hibisci Guenée, 1852 Green Fruitworm, Spckle.Grn.Fruitworm Moth | 4 | Subspecies |
| Species | Orthosia himalaya Hreblay & Ronkay, 1998
| | |
| Species | Orthosia hirsuta Warren, 1910
| | |
| Species | Orthosia huberti Hreblay & Ronkay, 1999
| | |
| Species | Orthosia ijimai Sugi, 1955
| | |
| Species | Orthosia ilicis Boisduval, 1829
| | |
| Species | Orthosia imitabilis Hreblay, 1995
| | |
| Species | Orthosia immaculata Staudinger, 1871
| | |
| Species | Orthosia incognita Sugi, 1955 ⇒ Orthosia (Orthosia) incerta
| | |
| Species | Orthosia inflava Smith, 1910 ⇒ Orthosia hibisci
| | |
| Species | Orthosia infrapicta Strand, 1917
| | |
| Species | Orthosia inherita Smith, 1910 ⇒ Orthosia hibisci
| | |
| Species | Orthosia insciens Walker, 1857 ⇒ Orthosia hibisci
| | |
| Species | Orthosia instabilis Schiffermüller, 1776 ⇒ Orthosia (Orthosia) incerta
| | |
| Species | Orthosia intermedia Stephens, 1829 ⇒ Orthosia (Monima) populeti
| | |
| Species | Orthosia japonica Warren, 1910 ⇒ Orthosia lizetta
| | |
| Species | Orthosia jezoensis Matsumura, 1926 ⇒ Orthosia (Semiophora) gothica
| | |
| Species | Orthosia johnstoni McDunnough, 1943 ⇒ Perigonica pectinata
| | |
| Species | Orthosia juncta Lucas, 1960 ⇒ Orthosia stabilis
| | |
| Species | Orthosia junctoides Lempke, 1964
| | |
| Species | Orthosia junctus Haworth, 1803
| | |
| Species | Orthosia kammeli Rebel, 1923
| | |
| Species | Orthosia kenderesiensis Kovacs, 1968
| | |
| Species | Orthosia kindermannii Fischer Röslerstamm, 1837
| | |
| Species | Orthosia kurosawai Sugi, 1986
| | |
| Species | Orthosia latirena Dod, 1910 ⇒ Orthosia hibisci
| | |
| Species | Orthosia lepida Scriba, 1793 ⇒ Orthosia (Cororthosia) gracilis
| | |
| Species | Orthosia ligata Feichtenberger, 1965
| | |
| Species | Orthosia limbata Butler, 1879
| 3 | Subspecies |
| Species | Orthosia litura Linnaeus, 1758
| 1 | Subspecies |
| Species | Orthosia lizetta Butler, 1878
| | |
| Species | Orthosia lota Duponchel, 1826 ⇒ Agrochola (Leptologia) lota
| | |
| Species | Orthosia lunifera Walker, 1857
| | |
| Species | Orthosia lushana Sugi, 1986
| | |
| Species | Orthosia macilenta Hreblay & Ronkay, 1998 ⇒ Agrochola (Leptologia) macilenta
| | |
| Species | Orthosia macona Smith, 1908 ⇒ Orthosia behrensiana
| | |
| Species | Orthosia malickyi Hacker, 1993
| | |
| Species | Orthosia malora Smith, 1910 ⇒ Orthosia hibisci
| | |
| Species | Orthosia manfredi Hreblay, 1994
| | |
| Species | Orthosia marginata Lempke, 1964
| | |
| Species | Orthosia marmorata Lempke, 1964
| | |
| Species | Orthosia mediofusca Hreblay & Ronkay, 1999
| | |
| Species | Orthosia mediolugens Schultz., 1900
| | |
| Species | Orthosia mediomacula Barnes & Benjamin, 1924 Khaki flounder | | |
| Species | Orthosia melaleuca
| | |
| Species | Orthosia meridionalis Staudinger, 1871
| | |
| Species | Orthosia mirabilis Sugi, 1955
| | |
| Species | Orthosia mithras Wiltshire, 1941
| | |
| Species | Orthosia moderata Walker, 1857
| | |
| Species | Orthosia mollis Mabille, 1885
| | |
| Species | Orthosia monimalis Draudt, 1950
| | |
| Species | Orthosia montana Reinhard, 1944 ⇒ Orthosimyia montana
| | |
| Species | Orthosia mulina Schaus, 1894
| | |
| Species | Orthosia mundincerta Horhammer, 1942
| | |
| Species | Orthosia mundoides Boursin, 1940
| | |
| Species | Orthosia murina Eversmann, 1848
| | |
| Species | Orthosia mys Dyar, 1902
| 2 | Subspecies |
| Species | Orthosia nanus Haworth, 1809
| | |
| Species | Orthosia nebulosus Haworth, 1803
| | |
| Species | Orthosia negussa Smith, 1900
| | |
| Species | Orthosia nepalensis Yoshimoto, 1993
| | |
| Species | Orthosia nictitans Lempke, 1964
| | |
| Species | Orthosia nigra Tutt, 1892
| | |
| Species | Orthosia nigralba Yoshimoto, 1993
| | |
| Species | Orthosia nigrilinea Cockayne, 1952
| | |
| Species | Orthosia nigrolinea Matsumura, 1926 ⇒ Orthosia lizetta
| | |
| Species | Orthosia nigromaculata Hoene, 1917
| | |
| Species | Orthosia nigropunctata Dufrane, 1935
| | |
| Species | Orthosia nigrorenalis Hampson, 1894
| | |
| Species | Orthosia nongenerica Barnes & Benjamin, 1924 Khaki flounder | | |
| Species | Orthosia nubilata Smith, 1910 ⇒ Orthosia hibisci
| | |
| Species | Orthosia nunatrum Schiffermüller, 1776 ⇒ Orthosia (Semiophora) gothica
| | |
| Species | Orthosia obliqua de Villers, 1789 ⇒ Orthosia stabilis
| | |
| Species | Orthosia obscura
| | |
| Species | Orthosia obscurior Strand, 1917
| | |
| Species | Orthosia obsolescens Lempke, 1940
| | |
| Species | Orthosia obsoleta Tutt, 1892
| | |
| Species | Orthosia ocularis FREYER, 1833 ⇒ Orthosia (Monima) populeti
| | |
| Species | Orthosia odiosa Butler, 1878
| | |
| Species | Orthosia olescens
| | |
| Species | Orthosia olivacea Warren, 1910 ⇒ Orthosia (Orthosia) incerta
| | |
| Species | Orthosia orbiculata Smith, 0
| | |
| Species | Orthosia pacifica Harvey, 1874 False-eye toby | | |
| Species | Orthosia palaga Reinhard, 1944 ⇒ Orthosimyia palaga
| | |
| Species | Orthosia pallescens Warren, 1910
| | |
| Species | Orthosia pallida Butler, 1877 ⇒ Orthosia (Orthosia) incerta
| | |
| Species | Orthosia pallidior Staudinger, 1901 ⇒ Orthosia (Orthosia) incerta
| | |
| Species | Orthosia palomarensis Hill, 1924 ⇒ Orthosia pulchella
| | |
| Species | Orthosia paromoea Hampson, 1905
| | |
| Species | Orthosia peregovitsi Hreblay & Ronkay, 1999
| | |
| Species | Orthosia perfusca Sugi, 1986
| | |
| Species | Orthosia pfennigschmidti Püngeler, 1925 ⇒ Orthosia nigromaculata
| | |
| Species | Orthosia picata Bang-Haas, 1912
| | |
| Species | Orthosia pistacina Denis & Schiffermüller, 1775
| | |
| Species | Orthosia pistacinoides d'Aubuisson, 1867
| | |
| Species | Orthosia plicata Smith, 1898
| | |
| Species | Orthosia plumbea Richardson, 1952
| | |
| Species | Orthosia pluriguttata Cockayne, 1952
| | |
| Species | Orthosia poecila Draudt, 1950
| | |
| Species | Orthosia populi Ström, 1783 ⇒ Orthosia (Monima) populeti
| | |
| Species | Orthosia porosa Eversmann, 1854
| 1 | Subspecies |
| Species | Orthosia postalbida Cockayne, 1952
| | |
| Species | Orthosia praeses Grote, 1879
| | |
| Species | Orthosia proba Smith, 1910 ⇒ Orthosia hibisci
| | |
| Species | Orthosia protensa Lempke, 1964
| | |
| Species | Orthosia pseudogothicina Lempke, 1964
| | |
| Species | Orthosia pulchella Harvey, 1876
| 3 | Subspecies |
| Species | Orthosia pulverulenta Esper, 1786 ⇒ Orthosia (Monima) cruda
| | |
| Species | Orthosia punctula Schaus, 1906
| | |
| Species | Orthosia punticostata Dyar, 1921
| | |
| Species | Orthosia pusillus Haworth, 1809
| | |
| Species | Orthosia quadriplana Walker, 1865 ⇒ Proteuxoa flexirena
| | |
| Species | Orthosia quinquefasciata Smith, 1909 ⇒ Orthosia hibisci
| | |
| Species | Orthosia reducta
| | |
| Species | Orthosia renilinea Cockayne, 1952
| | |
| Species | Orthosia reshoefti Hreblay & Plante, 1994
| | |
| Species | Orthosia reticulata Yoshimoto, 1994
| 2 | Subspecies |
| Species | Orthosia revicta Morrison, 1875 Rusty whitesided caterpillar, Subdued Quaker | | |
| Species | Orthosia rhadama Millière, 1883
| | |
| Species | Orthosia rifana Rungs, 1972
| | |
| Species | Orthosia ronkayorum Volynkin & Titov, 0
| | |
| Species | Orthosia rorida Frivaldsky, 1835 ⇒ Perigrapha (Rororthosia) rorida
| 1 | Subspecies |
| Species | Orthosia rosea Tutt, 1892
| | |
| Species | Orthosia roseasparsus Tutt, 1892
| | |
| Species | Orthosia rubella Duponchel, 1835
| | |
| Species | Orthosia rubescens Walker, 1865 Ruby Quaker, Ruby Quaker Moth | | |
| Species | Orthosia rubricosa Esper, 1786 ⇒ Cerastis rubricosa
| | |
| Species | Orthosia rufa Dannehl, 1926
| | |
| Species | Orthosia rufannulata Lempke, 1940 ⇒ Orthosia stabilis
| | |
| Species | Orthosia rufannulatus Haworth, 1809
| | |
| Species | Orthosia rufescens Tutt, 1892
| | |
| Species | Orthosia rufofusca Strand, 1917
| | |
| Species | Orthosia rufogrisea Tutt, 1892
| | |
| Species | Orthosia rufomaculata Lempke, 1940
| | |
| Species | Orthosia rupicapra Staudinger, 1879
| | |
| Species | Orthosia ruticilla Esper, 1791
| | |
| Species | Orthosia saleppa Smith, 1907 ⇒ Orthosia praeses
| | |
| Species | Orthosia satoi Sugi, 1959
| | |
| Species | Orthosia schmidti Diószeghy, 1935
| | |
| Species | Orthosia schmidtii Diószeghy, 1935
| | |
| Species | Orthosia scythrastis
| | |
| Species | Orthosia segregata Smith, 1891
| 2 | Subspecies |
| Species | Orthosia sellingi Fibiger, Hacker & Moberg, 1996
| | |
| Species | Orthosia semiconfluens Lempke, 1940
| | |
| Species | Orthosia semigothica Lempke, 1964
| | |
| Species | Orthosia sieversi Christoph, 1885
| | |
| Species | Orthosia signata Lempke, 1964
| | |
| Species | Orthosia sinelinea Lempke, 1940
| | |
| Species | Orthosia sinens Walker, 1857
| | |
| Species | Orthosia singularis Hreblay & Ronkay, 1998
| | |
| Species | Orthosia songi Chen & Zhang, 1995 ⇒ Protegira songi
| | |
| Species | Orthosia sparsus Haworth, 1803
| | |
| Species | Orthosia stabilis Schiffermüller, 1775 Common Quaker | 1 | Subspecies |
| Species | Orthosia stenoptera Staudinger, 1892 ⇒ Harutaeographa stenoptera
| | |
| Species | Orthosia stigmata Barnes & Benjamin, 1924 ⇒ Orthosia praeses
| | |
| Species | Orthosia striata Tutt, 1892
| | |
| Species | Orthosia strigatteria Hill, 1923 ⇒ Orthosia ferrigera
| | |
| Species | Orthosia subcarnea Warren, 1910 ⇒ Orthosia (Orthosia) incerta
| | |
| Species | Orthosia subcarnipennis Haruta, 1992
| | |
| Species | Orthosia subnigra Walker, 1857
| | |
| Species | Orthosia subplumbeus Haworth, 1809
| | |
| Species | Orthosia subsetaceus Haworth, 1803
| | |
| Species | Orthosia substriata Cockayne, 1951
| | |
| Species | Orthosia subterminata Smith, 1887 ⇒ Orthosia revicta
| | |
| Species | Orthosia suffusa Tutt, 1892
| | |
| Species | Orthosia taeniata
| | |
| Species | Orthosia tangens Rungs, 1972
| | |
| Species | Orthosia tenuimacula Barnes & McDunnough, 1913 California tonguefish | | |
| Species | Orthosia terminata Smith, 1887
| | |
| Species | Orthosia tihanyensis Szent-Ivány, 1943
| | |
| Species | Orthosia totoobsolescens Hoffmeyer, 1958
| | |
| Species | Orthosia transparens Grote, 1881
| | |
| Species | Orthosia tremuleti Tetens, 1876 ⇒ Orthosia (Monima) populeti
| | |
| Species | Orthosia trigutta Esper, 1790 ⇒ Orthosia (Orthosia) incerta
| | |
| Species | Orthosia typhlopa Lower, 1900 ⇒ Rhynchaglaea perscitula
| | |
| Species | Orthosia unicolor Tutt, 1892
| | |
| Species | Orthosia ussuriana Kononenko, 1988
| | |
| Species | Orthosia ussurica Kononenko, 1988
| | |
| Species | Orthosia variabilis Wang & Chen, 1995
| | |
| Species | Orthosia variegata Tutt, 1892
| | |
| Species | Orthosia venata Smith, 1890 ⇒ Orthosia rubescens
| | |
| Species | Orthosia violacea Caradja, 1931
| | |
| Species | Orthosia virgata Tutt, 1892
| | |
| Species | Orthosia virgatagrisea Tutt, 1892
| | |
| Species | Orthosia vittata Spuler, 1906
| | |
| Species | Orthosia wangwene Benedek & Saldaitis, 0
| | |
| Species | Orthosia witzenmanni Standfuss, 1890
| | |
| Species | Orthosia wolfi Hacker, 1988
| | |
| Species | Orthosia yeterufica Bryk, 1942 ⇒ Orthosia (Semiophora) gothica
| | |
| Species | Orthosia yoshizakii Sugi & Ohtsuka, 1984
| | |
| Species | Orthosia ypsilon Denis & Schiffermüller, 1775
| | |