| Ianassa Walker, preoccupied | 930104 | |
| Ianius Richards | 930881 | |
| iaspis Guenée, Chytonix, [Apamea] | 932249 | |
10144 | ibapahensis Barnes & Benjamin, Sympistis, [Oncocnemis] | 931854 | |
| Icasma Turner | 931141 | |
| ichinosawana Matsumura, Eurois, [Rhyacia] | 933560 | |
| Ichthyura Hübner | 930002 | |
| icole Grote, Condica, [Perigea] | 931992 | |
9861 | ida Rindge & Smith, Annaphila | 931746 | |
10826 | idahoensis Grote, Euxoa, [Agrotis] | 933435 | |
| Idechthis Hübner | 930758 | |
9120 | idella Barnes, Tarache, [Cerathosia] | 931364 | |
| Idia Hübner | 930468 | |
| idonea Cramer, Agrotis, [Phalaena] | 933528 | |
| idonea Grote, Apamea, [Hadena], form | 932300 | |
| igna Barnes & Benjamin, Tricholita, [Chabuata] | 933193 | |
8949 | ignea Grote, Syngrapha, [Plusia] | 931223 | |
| ignobilis Butler, Spodoptera, [Prodenia] | 932223 | |
| ignorata Eitschberger, Xestia, [Amathes] | 933588 | |
| ignota Barnes & Benjamin, Condica, [Namangana] | 932011 | |
| ignota Swinhoe, Ochropleura | 933529 | |
| Ilattia Walker | 931251 | |
| ilia Cramer, Catocala– ssp., [Phalaena] | 930792 | |
8801 | ilia Cramer, Catocala, [Phalaena] | 930792 | |
| iliana Strand, Catocala | 930792 | |
| Ilipa Walker | 930443 | |
| Ilipa Walker | 930455 | |
| illabefacta Morrison, Trichordestra, [Mamestra] | 932889 | |
10903 | illapsa Walker, Anicla, [Graphiphora] | 933216 | |
| illata Walker, Euxoa, [Agrotis] | 933424 | |
| Illatia Hampson, misspelled | 931251 | |
| illaudabilis Grote, Lacinipolia, [Mamestra] | 933069 | |
| illecebra Franclemont, Lithophane, form | 932534 | |
8840 | illecta Walker, Catocala | 930826 | |
| illepida Grote, Andropolia, [Polia] | 932680 | |
| Illice Walker | 930175 | |
10348.1 | illima Crabo & Lafontaine, Lasionycta | 932984 | |
| illinoiensis French, Pyrrhia, [Heliothis] | 932042 | |
| illita Smith, Acronicta– ssp., [Acronycta] | 931474 | |
8551 | illita Guenée, Anomis | 930608 | |
| illiterata Grote, Pyrrhia | 932042 | |
8426 | illocata Warren, Dyspyralis | 930669 | |
9420 | illocata Walker, Fishia, [Hadena] | 932695 | |
| illuminans Walker, Melipotis, [Bolina] | 930870 | |
11170 | illustra Smith, Schinia | 932164 | |
| illustra Smith, Apamea, [Xylophasia] | 932329 | |
8894 | illustrata Guenée, Notioplusia, [Plusia] | 931175 | |
| imbella Walker, Condica, [Perigea] | 931997 | |
10276 | imbrifera Guenée, Polia, [Aplecta] | 932868 | |
| imbuna Smith, Lacinipolia, [Mamestra] | 933039 | |
| imitella Stretch, Cydosia | 931254 | |
| immacula Strand, Microhelia | 932035 | |
10218 | immacula Grote, Sparkia, [Cea] | 932818 | |
8476 | immaculalis Harvey, Hemeroplanis, [Pleonectyptera] | 930710 | |
8337 | immaculalis Hulst, Idia, [Botis] | 930486 | |
| immaculata Benjamin, Exyra, form | 931189 | |
11157.1 | immaculata Pogue, Schinia, [Melicleptria] | 932071 | |
8124 | immaculata Reakirt, Virbia, [Crocota] | 930307 | |
| immaculata Draudt, Holoarctia, [Orodemnias] | 930234 | |
| immaculata Morrison, Anathix, excluded | 990048 | |
| immaculata Lempke, Euproctis | 930172 | |
| immaculata Graef, Eupseudosoma, [Euchaetes] | 930389 | |
9513 | immanis Guenée, Hydraecia, [Hydroecia] | 932457 | |
10753 | immixta Grote, Euxoa, [Agrotis] | 933384 | |
11212 | immortua Grote, Melaporphyria | 932189 | |
| immuna Smith, Dyspyralis, [Erastria] | 930671 | |
8750.1 | immunis Guenée, Ptichodis, [Phurys] | 930933 | |
| imora Strecker, Pseudorthodes, [Orthodes] | 933128 | |
| impacta Walker, Peridroma, [Agrotis] | 933211 | |
| impar Guenée, Lesmone, [Bendis] | 930974 | |
8720 | impartialis Harvey, Eubolina | 931056 | |
8548 | impasta Guenée, Anomis | 930605 | |
| impecuniosa of authors, Papaipema, not Grote, 1881 | 932484 | |
9473 | impecuniosa Grote, Papaipema, [Gortyna] | 932500 | |
10452 | imperfecta Smith, Leucania | 932953 | |
| imperialis Barnes & McDunnough, Schinia, [Chlorocleptria] | 932080 | |
10965 | imperita Hübner, Xestia, [Ogygia] | 933598 | |
| imperspicua of authors, Papaipema, not Bird, 1908 | 932499 | |
| imperspicua Bird, Papaipema | 932465 | |
| imperspicua Strecker, Schinia, [Heliothis] | 932092 | |
| imperturbata Smith, Papaipema | 932510 | |
10339 | impingens Walker, Lasionycta, [Anarta] | 933010 | |
| impingens Walker, Lasionycta– ssp., [Anarta] | 933010 | |
| impingens Dyar, Feltia, [Episilia] | 933494 | |
10891 | implecta Lafontaine, Ochropleura | 933529 | |
| implens Walker, Ephyrodes | 931083 | |
9257 | impleta Walker, Acronicta, [Acronycta] | 931474 | |
| impleta Walker, Acronicta– ssp., [Acronycta] | 931474 | |
| implicata Lefebvre, Eurois– ssp., [Hadena] | 933560 | |
10414 | implicata McDunnough, Lacinipolia | 933068 | |
9729 | implora Grote, Azenia | 931728 | |
| impolita Morrison, Papestra, [Mamestra] | 932894 | |
| impressa Butler & Druce, Caenurgina, [Remigia] | 930923 | |
9261 | impressa Walker, Acronicta, [Acronycta] | 931477 | |
| imprimata Möschler, Amyna, [Mesostrosta] | 931252 | |
9360 | impulsa Guenée, Apamea, [Mamestra] | 932311 | |
8050 | impura Barnes & McDunnough, Crambidia | 930224 | |
| inattenta Smith, Eueretagrotis | 933569 | |
9071 | inca Dyar, Aleptina | 931633 | |
| incallida Walker, Resapamea, [Agrotis] | 932368 | |
| incallida Smith, Euxoa, [Agrotis] | 933405 | |
| incana Edwards, Acopa | 931627 | |
| incandescens Grote, Bulia, [Cirrhobolina] | 930885 | |
| incarcerata Boisduval, Clostera | 930009 | |
8246 | incarnata Walker, Lerina | 930388 | |
| incarnata Stretch, Apantesis, [Arctia] | 930278 | |
| incarnata Walker, Arachnis, [Ecpantheria] | 930330 | |
| incarnatorubra Goeze, Grammia, [Noctua] | 930240 | |
| inceptaria Walker, Phalaenostola, [Numeria] | 930512 | |
| incidens Walker, Bagisara | 931240 | |
10552 | incincta Morrison, Protorthodes, [Mamestra] | 933105 | |
| incisa Gundlach, Anicla, [Agrotis] | 933212 | |
| Incita Grote | 932061 | |
| incivis Guenée, Anicla, [Agrotis] | 933212 | |
| inclara Strecker, Schinia, [Heliothis] | 932123 | |
9250 | inclara Smith, Acronicta, [Acronycta] | 931468 | |
| inclinata Walker, Condica, [Celaena] | 931992 | |
8890 | includens Walker, Chrysodeixis, [Plusia] | 931170 | |
9434 | includens Walker, Photedes, [Hydrelia] | 932421 | |
7896 | inclusa Hübner, Clostera, [Ichthyura] | 930004 | |
| inclusa Hübner, Clostera– ssp., [Ichthyura] | 930004 | |
10450 | incognita Barnes & McDunnough, Leucania, [Cirphis] | 932950 | |
| incognita Smith, Euxoa, [Agrotiphila] | 933476 | |
10064 | incomitata Harvey, Sympistis, [Homohadena] | 931826 | |
| incompleta Butler, Apantesis, [Arctia] | 930278 | |
| incompleta Reuter, Syngrapha, [Plusia] | 931230 | |
10732 | inconcinna Harvey, Euxoa, [Agrotis] | 933310 | |
10252 | inconcinna Smith, Anarta, [Scotogramma] | 932832 | |
7989 | incongrua Barnes & Benjamin, Heterocampa | 930081 | |
| inconspicua Smith, Aseptis, [Hadena] | 932636 | |
10593 | inconspicua Grote, Hexorthodes, [Tricholita] | 933150 | |
10450.1 | inconspicua Herrich-Schäffer, Leucania | 932951 | |
| inconspicualis Grote, Zanclognatha, [Megachyta] | 930490 | |
| inconstans Smith, Acronicta, [Acronycta] | 931468 | |
10061 | inconstans Grote, Sympistis, [Homohadena] | 931827 | |
8612 | inconstans Guenée, Panula | 930883 | |
8180 | incorrupta Edwards, Grammia, [Arctia] | 930255 | |
10212 | incresa Smith, Cucullia, [Copicucullia] | 931526 | |
9249 | increta Morrison, Acronicta, [Acronycta] | 931467 | |
| incubita Smith, Euxoa, [Carneades] | 933317 | |
10093.1 | incubus Troubridge, Sympistis | 931844 | |
8092 | inculta Edwards, Hypoprepia | 930207 | |
8542 | incurva Sepp, Gonodonta, [Phalaena] | 930619 | |
10373 | incurva Smith, Lacinipolia, [Mamestra] | 933020 | |
8474 | incusalis Grote, Hemeroplanis, [Bomolocha] | 930707 | |
| indecisa Walker, Condica, [Perigea] | 931998 | |
| indecoris Schaus, Dasylophia | 930135 | |
| indela Smith, Apamea– ssp., [Agroperina] | 932347 | |
| indensa Smith, Euxoa | 933397 | |
| indentata Packard, Clostera, [Ichthyura] | 930009 | |
| indentata Harvey, Mocis, [Remigia] | 930942 | |
| indeterminata Walker, Heterocampa, [Drymonia] | 930086 | |
10991 | indeterminata Walker, Adelphagrotis, [Xylina] | 933641 | |
9054 | indeterminata Barnes & McDunnough, Pseudeustrotia, [Lithacodia] | 932206 | |
11095 | indiana Smith, Schinia, [Heliolonche] | 932069 | |
7945 | indiana Grote, Nystalea | 930121 | |
| indica Guenée, Anomis, [Cosmophila] | 930603 | |
| indicans Walker, Lacinipolia, [Hapalia] | 933065 | |
| indicta Smith, Cucullia | 931508 | |
9652 | indigena Barnes & Benjamin, Anorthodes, [Athetis] | 932271 | |
| indigens Walker, Condica, [Nonagria] | 931989 | |
| indigna Walker, Ctenoplusia, [Plusia] | 931169 | |
9401 | indirecta Grote, Xylomoia, [Hadena] | 932417 | |
| indirecta Walker, Pyreferra, [Xanthia] | 932583 | |
| indirecta Walker, Euxoa, [Mamestra] | 933319 | |
8594 | indiscreta Edwards, Cissusa, [Phoberia] | 930866 | |
8215 | indistincta Barnes & McDunnough, Lophocampa, [Halisidota] | 930374 | |
| indistincta Strand, Lacinipolia | 933042 | |
9581 | indistincta Smith, Hyppa | 932668 | |
| indistincta Butler, Melipotis, [Achaea] | 930869 | |
| indivisalis Grote, Lascoria, [Tortricodes] | 930547 | |
9362 | indocilis Walker, Apamea, [Xylophasia] | 932310 | |
8600 | indomita Walker, Melipotis, [Bolina] | 930871 | |
| indra Smith, Protorthodes, [Taeniocampa] | 933105 | |
| indubitans Walker, Ponometia, [Nonagria] | 931335 | |
| indurata Smith, Egira– ssp., [Xylomiges] | 932794 | |
10060 | induta Harvey, Sympistis, [Homohadena] | 931818 | |
9327 | inebriata Ferguson, Apamea | 932295 | |
| inelegans Smith, Parabagrotis, [Agrotis] | 933644 | |
8622 | inepta Edwards, Drasteria, [Synedoida] | 930895 | |
| inepta Walker, Spodoptera, [Laphygma] | 932216 | |
9412.1 | inermis Troubridge & Lafontaine, Neoligia | 932393 | |
| inermis Harris, Peridroma, [Agrotis] | 933211 | |
10459 | inermis Forbes, Leucania, [Cirphis] | 932963 | |
| inexacta Walker, Metallata, [Thermesia] | 931075 | |
8413 | inexplicata Walker, Mycterophora, [Scotosia] | 930674 | |
| inextricata Walker, Euxoa, [Mamestra] | 933319 | |
| infanta Smith, Colocasia, [Demas] | 931400 | |
10457 | infatuans Franclemont, Leucania | 932961 | |
10785 | infausta Walker, Euxoa, [Hadena] | 933412 | |
10911 | infecta Ochsenheimer, Anicla, [Agrotis] | 933212 | |
| infecta Walker, Lacinipolia, [Celaena] | 933044 | |
| infelix Guenée, Condica, [Perigea] | 932014 | |
| infelix Smith, Euxoa, [Agrotis] | 933356 | |
8371 | inferior Grote, Bleptina | 930522 | |
10475 | inferior Smith, Stretchia, [Perigrapha] | 932760 | |
| infernalis Schaus, Eriopyga, [Mamestra] | 933162 | |
| infernalis Rebel, Orgyia | 930160 | |
8955 | inficita Walker, Marathyssa, [Eutelia] | 931103 | |
9369 | inficita Walker, Apamea, [Graphiphora] | 932347 | |
| inficita Walker, Apamea– ssp., [Graphiphora] | 932347 | |
| infidelis Dyar, Anhimella, [Himella] | 933086 | |
| infidelis Grote, Morrisonia | 932802 | |
10972 | infimatis Grote, Xestia, [Agrotis] | 933581 | |
10065 | infixa Walker, Sympistis, [Xylophasia] | 931825 | |
| inflava Smith, Orthosia, [Taeniocampa] | 932778 | |
| inflexa Morrison, Collomena, [Laphygma] | 931156 | |
10850 | infracta Morrison, Euxoa, [Agrotis] | 933453 | |
| infraina Haworth, Anarta, [Noctua] | 932826 | |
| infranigricosta Lempke, Leucoma | 930170 | |
| infrapicta Strand, Orthosia | 932777 | |
| infructuosa Walker, Morrisonia, [Xylina] | 932803 | |
| infumata Hampson, Gabara, [Eucalyptra] | 930641 | |
| infumata Felder & Rogenhofer, Anticarsia, [Thermesia] | 931077 | |
9549 | infumata Grote, Enargia, [Orthosia] | 932674 | |
| infumata of authors, Enargia, not Grote, 1874 | 932675 | |
| infusa Smith, Euxoa, [Carneades] | 933428 | |
| infusa Dyar, Datana | 930039 | |
| infuscata Smith, Lasionycta, [Scotogramma] | 933005 | |
| infuscata Blanchard, Peridroma, [Spaelotis] | 933211 | |
| ingeniculata Smith, Richia, [Agrotis] | 933267 | |
8620 | ingeniculata Morrison, Drasteria, [Syneda] | 930893 | |
8208 | ingens Edwards, Lophocampa, [Halesidota] | 930367 | |
8591.1 | ingenua Walker, Phoberia, [Poaphila] | 930863 | |
| ingenua Smith, Charadra | 931406 | |
| ingravis Smith, Papestra– ssp., [Mamestra] | 932892 | |
| Ingura Guenée | 931105 | |
| Inguridia Butler | 931160 | |
| inherita Smith, Orthosia, [Taeniocampa] | 932778 | |
| injecta Dyar, Cisthene, [Illice] | 930184 | |
| innata Herrich-Schäffer, Trichoplusia, [Plusia] | 931168 | |
| innexa Grote, Lacinipolia, [Perigrapha] | 933050 | |
9888 | innominata Smith, Lithophane, [Xylina] | 932534 | |
9387 | innota Smith, Resapamea, [Luperina] | 932365 | |
| innotabilis Grote, Adelphagrotis, [Agrotis] | 933641 | |
9207 | innotata Guenée, Acronicta, [Acronycta] | 931428 | |
| innuba Treitschke, Noctua, [Triphaena] | 933551 | |
8770 | innubens Guenée, Catocala | 930761 | |
| innubenta Strand, Catocala, [Catabapta] | 930761 | |
8680.1 | inopinata Franclemont, Matigramma | 931010 | |
8228 | inopinatus Edwards, Cycnia, [Euchetes] | 930401 | |
| inopinatus Smith, Graphiphora, [Noctua] | 933563 | |
| inops Stephens, Hemeroplanis, [Scopelopus] | 930700 | |
9435 | inops Grote, Photedes, [Orthosia] | 932419 | |
| Inopsis Felder | 930228 | |
9353 | inordinata Morrison, Apamea, [Hadena] | 932316 | |
| inordinata Morrison, Apamea– ssp., [Hadena] | 932316 | |
| inordita Barnes & Benjamin, Euxoa, [Agrotis] | 933319 | |
8275 | inornata Walker, Episcepsis, [Automolis] | 930451 | |
| inornata Walker, Amyna, [Miana] | 931253 | |
| inornata Grote, Spragueia | 931392 | |
10219 | inornata Grote, Trichocosmia | 932819 | |
7897 | inornata Neumögen, Clostera, [Ichthyura] | 930005 | |
| inornata Grote, Amphipyra | 931544 | |
| inornata Ottolengui, Hypoprepia | 930205 | |
| inornata Beutenmüller, Orgyia | 930165 | |
| inquaesita Barnes & Benjamin, Tripudia, [Cobubatha] | 931257 | |
| inquaesita of authors, Papaipema, not Grote & Robinson, 1868 | 932500 | |
9483 | inquaesita Grote & Robinson, Papaipema, [Gortyna] | 932476 | |
| inquieta Walker, Spodoptera, [Xylina] | 932223 | |
| inquieta Walker, Anarta, [Apamea] | 932826 | |
| inquieticolor Dyar, Cutina, [Taseopteryx] | 930964 | |
9437 | inquinata Guenée, Hypocoena, [Nonagria] | 932426 | |
| inquinatus Hogue, Basilodes, excluded | 990046 | |
| inquisita Dyar, Hypotrix, [Scriptania] | 933171 | |
8664.1 | insana Guenée, Euclystis, [Amphigonia] | 930989 | |
10093.5 | insanina Troubridge, Sympistis | 931848 | |
| insciens Walker, Orthosia | 932778 | |
| inscripta Walker, Anterastria, [Erastria] | 932207 | |
10830.1 | inscripta Lafontaine, Euxoa | 933456 | |
| insertans Smith, Trichocerapoda, [Agrotis] | 933083 | |
| insignalis Walker, Palthis, [Bertula] | 930552 | |
| insignata Walker, Euxoa, [Agrotis] | 933424 | |
| insignata Schultz, Lymantria | 930141 | |
| insignata Strand, Heliotropha | 932443 | |
| insignata Walker, Apamea | 932344 | |
| insignata Walker, Euxoa, [Agrotis] | 933395 | |
| insignis Walker, Plusiodonta | 930622 | |
| insinuata Smith, Homoglaea, [Orrhodia] | 932526 | |
| insipida Strecker, Photedes, [Caradrina], form | 932419 | |
| insipida Felder & Rogenhofer, Melipotis, [Panula] | 930872 | |
| insipidella Strand, Photedes | 932419 | |
| insita Walker, Acronicta– ssp., [Acronycta] | 931423 | |
9202 | insita Walker, Acronicta, [Acronycta] | 931423 | |
| insolabilella Strand, Catocala, [Catabapta] | 930781 | |
8791 | insolabilis Guenée, Catocala | 930781 | |
10366 | insolens Grote, Psammopolia, [Dianthoecia] | 933013 | |
| insolita Smith, Autographa, [Plusia] | 931208 | |
| insolita Grote, Acronicta, [Acronycta] | 931485 | |
| insperata Grote, Cissusa, [Synedoida] | 930867 | |
| inspinosa Guenée, Agrotis | 933526 | |
9847 | instans Smith, Minofala | 932817 | |
| instruta Smith, Fishia | 932693 | |
8696 | insuda Smith, Zale, [Phaeocyma] | 931031 | |
| insueta Guenée, Leucania– ssp. | 932948 | |
10449 | insueta Guenée, Leucania | 932948 | |
11047.2 | insularis Grote, Parabagrotis, [Agrotis] | 933644 | |
| insularis Herrich-Schäffer, Simyra– ssp., [Tapinostola] | 931493 | |
9280 | insularis Herrich-Schäffer, Simyra, [Tapinostola] | 931493 | |
| insularis Clarke, Arachnis– ssp. | 930327 | |
| insularis of authors, Elasmia, not Grote, 1866 | 930126 | |
| insularis Möschler, Massala, [Capnodes] | 931088 | |
8227 | insulata Walker, Pareuchaetes, [Halesidota] | 930387 | |
9488 | insulidens Bird, Papaipema, [Hydroecia] | 932480 | |
| insulsa Walker, Euxoa, [Mamestra] | 933395 | |
| intecta Walker, Peridroma, [Agrotis] | 933211 | |
| integerrima Grote & Robinson, Datana– ssp. | 930038 | |
7907 | integerrima Grote & Robinson, Datana | 930038 | |
| integerrima Walker, Metria, [Homoptera] | 930992 | |
| intensa Rothschild, Cargida– ssp. | 930052 | |
| intensalis Smith, Idia, [Epizeuxis] | 930482 | |
| intensinalis Lafontaine & Schmidt, Idia, misspelled | 930482 | |
| intensiva Warren, Heliothis | 932049 | |
8713 | intenta Walker, Zale, [Homoptera] | 931048 | |
| intentata Smith, Lacinipolia, [Mamestra] | 933027 | |
| interalia Ottolengui, Syngrapha, [Autographa] | 931225 | |
8740 | intercalaris Grote, Callistege, [Euclidia] | 930918 | |
| interferens Walker, Feltia, [Agrotis] | 933504 | |
| interjacens Grote, Heliothis | 932046 | |
10194 | intermedia Speyer, Cucullia | 931514 | |
10969.1 | intermedia Kononenko, Xestia, [Agrotiphila] | 933609 | |
| intermedia Stretch, Grammia, [Arctia] | 930246 | |
| intermedia Forbes, Anaplectoides, laps. cal. | 933566 | |
| intermedia Guth, Apamea, [Hadena] | 932353 | |
| intermedia Graef, Virbia, [Crocota] | 930295 | |
9517 | intermedia Barnes & Benjamin, Hydraecia, [Gortyna] | 932461 | |
| intermedia Butler, Utetheisa, [Deiopeia] | 930348 | |
| intermedia Fitch, Orgyia– ssp. | 930168 | |
| intermedia Speyer, Cucullia– ssp. | 931514 | |
| intermissa Walker, Anarta, [Hadena] | 932826 | |
| intermittens Walker, Condica, [Apamea] | 932002 | |
9785.1 | intermixta Dyar, Stiria | 931689 | |
10737 | intermontana Lafontaine, Euxoa | 933314 | |
11083.2 | intermontana Hardwick, Schinia | 932106 | |
| interna Barnes & McDunnough, Galgula, misspelled | 932249 | |
| interna Grote, Trachea, [Hadena] | 932280 | |
| interna Packard, Dasylophia | 930134 | |
| internalis Robinson, Hypena | 930564 | |
9456 | interoceanica Smith, Amphipoea, [Hydroecia] | 932446 | |
| interposita Dyar, Dasychira, [Olene] | 930156 | |
| interposita Maassen, Feltia, [Agrotis] | 933504 | |
8411 | interpuncta Grote, Colobochyla, [Madopa] | 930590 | |
| interpuncta Grote, Colobochyla– ssp., [Madopa] | 930590 | |
9444 | interrogans Walker, Franclemontia, [Leucania] | 932432 | |
8937 | interrogationis Linnaeus, Syngrapha, [Phalaena] | 931216 | |
| interrupta Draudt, Cisthene, [Illice] | 930183 | |
9237 | interrupta Guenée, Acronicta, [Acronycta] | 931454 | |
| interruptomarginata Beauvois, Haploa, [Bombyx] | 930341 | |
| interruptus Smith, Ponometia, [Conochares] | 931334 | |
11159 | intrabilis Smith, Schinia | 932152 | |
| intracta Walker, Actebia, [Hadena] | 933229 | |
| intractabilis Walker, Protodeltote, [Nonagria] | 931291 | |
| intractata Morrison, Himella, [Taeniocampa] | 932785 | |
| intricata Dyar, Euxoa, [Mesembreuxoa] | 933381 | |
10749 | intrita Morrison, Euxoa, [Agrotis] | 933360 | |
| introferens Grote, Euxoa, [Agrotis] | 933309 | |
10137 | intruda Smith, Sympistis, [Oncocnemis] | 931830 | |
| intrusa Smith, Euxoa, [Carneades] | 933359 | |
10980.1 | inuitica Lafontaine & Hensel, Xestia | 933593 | |
9943 | inulta Grote, Metaxaglaea, [Orthosia] | 932597 | |
| inusta Guenée, Bagisara, [Atethmia] | 931240 | |
10314 | invalida Smith, Papestra, [Mamestra] | 932896 | |
| invenusta Grote, Setagrotis, [Agrotis] | 933634 | |
9413.2 | invenusta Troubridge & Lafontaine, Neoligia | 932399 | |
| inversa Packard, Clostera, [Ichthyura] | 930004 | |
| involuta Sepp, Eupseudosoma– ssp., [Phalaena] | 930389 | |
8998 | involuta Dyar, Nola | 931138 | |
| involuta Walker, Zale, [Homoptera] | 931032 | |
8257 | involuta Sepp, Eupseudosoma, [Phalaena] | 930389 | |
| involutum Sepp, Eupseudosoma, gender-conform | 930389 | |
10670.1 | inyoca Lafontaine, Feltia | 933499 | |
10789 | inyoca Benjamin, Euxoa | 933418 | |
| Iodopepla Franclemont | 932286 | |
| iole Grote, Condica, not Grote, 1876 | 931992 | |
| iole Druce, Macrocneme | 930449 | |
10605.1 | iole Schaus, Pseudorthodes, [Orthodes] | 933135 | |
| Iphimorpha Möschler, misspelled | 932676 | |
9019.1 | ipilla Dyar, Cobubatha, [Tripudia] | 931279 | |
| Ipimorpha Hübner | 932676 | |
| ipomaeae Doubleday, Schizura | 930098 | |
8282 | ipomoeae Harris, Syntomeida, [Glaucopis] | 930460 | |
8005 | ipomoeae Doubleday, Schizura | 930098 | |
10663 | ipsilon Hufnagel, Agrotis, [Phalaena] | 933528 | |
8807 | irene Behr, Catocala | 930799 | |
| irentis Smith, Metalectra, [Yrias] | 930686 | |
10092 | iricolor Smith, Sympistis, [Oncocnemis] | 931831 | |
| iridis Dyar, Oligia– ssp. | 932382 | |
9546 | iris Guenée, Phlogophora | 932291 | |
9967 | iris Zetterstedt, Hillia, [Hadena] | 932624 | |
| irrecta Walker, Hemeroplanis, [Poaphila] | 930700 | |
| irregularis of authors, Lesmone, not Hübner, 1808 | 930974 | |
9079 | irresoluta Dyar, Eublemma | 930696 | |
| irresoluta Walker, Elaphria, [Celaena] | 932230 | |
8392 | irrigualis Möschler, Phlyctaina | 930546 | |
10582 | irrorata Smith, Pseudorthodes, [Orthodes] | 933132 | |
| irrorata Edwards, Clemensia | 930215 | |
| irrorata Grote, Ptichodis, [Poaphila] | 930935 | |
| isabella Edwards, Catocala | 930855 | |
8129 | isabella Smith, Pyrrharctia, [Phalaena] | 930335 | |
| Iscadia Walker | 931146 | |
10082.5 | isis Troubridge, Sympistis | 931841 | |
| islandica Staudinger, Euxoa, [Agrotis] | 933424 | |
| Isochlora Staudinger | 933692 | |
| Isogona Guenée | 930732 | |
9920 | itata Smith, Lithophane, [Xylina] | 932565 | |
| itelmena Bryk, Spaelotis, [Amphitrota] | 933554 | |
| Iteophaga Boursin | 932651 | |
| itodes Smith, Euxoa, [Carneades] | 933369 | |
| Itomia Hübner | 930977 | |
| ixion Druce, Catocala | 930817 | |