Opinions from T. D. A. Cockerell 1921
- 'Agrionidae belongs to Odonata'
- 'Anthomydae is corrected as Anthomyiidae and belongs to Diptera'
- 'Anthomyia belongs to Anthomyiidae'
- 'Anthomyia winchesteri belongs to Anthomyia'
- 'Asilici is corrected as Asilidae and belongs to Diptera'
- 'Asilopsis belongs to Asilidae'
- 'Asilopsis fusculus belongs to Asilopsis'
- 'Bibionidae belongs to Diptera'
- 'Blephariceridae is corrected as Blepharoceridae and belongs to Diptera'
- 'Braconidae belongs to Hymenoptera'
- 'Callospilopteron belongs to Fulgoridae'
- 'Callospilopteron ocellatum belongs to Callospilopteron'
- 'Calopterygidae is a subjective synonym of Agrionidae'
- 'Carabici is corrected as Carabidae and belongs to Coleoptera'
- 'Carabites belongs to Carabidae'
- 'Carabites eocenicus belongs to Carabites'
- 'Cercopida is corrected as Cercopidae and belongs to Homoptera'
- 'Cercopis belongs to Cercopidae'
- 'Cercopis cephalinus belongs to Cercopis'
- 'Chrysomelinae is corrected as Chrysomelidae and belongs to Coleoptera'
- 'Cicadella belongs to Cicadellidae'
- 'Cicadella scudderi belongs to Cicadella'
- 'Cicadellae was reranked as the family Cicadellidae and belongs to Homoptera'
- 'Cicindeletae is corrected as Cicindelidae and belongs to Coleoptera'
- 'Cicindelopsis belongs to Coleoptera'
- 'Cicindelopsis eophilus belongs to Cicindelopsis'
- 'Coleoptera belongs to Insecta'
- 'Crioceris belongs to Chrysomelidae'
- 'Culex belongs to Culicidae'
- 'Culex winchesteri belongs to Culex'
- 'Culicidae belongs to Diptera'
- 'Cylindrotoma belongs to Tipulidae'
- 'Cylindrotoma veterana belongs to Cylindrotoma'
- 'Cyttaromyia belongs to Tipulidae'
- 'Cyttaromyia fenestrata belongs to Cyttaromyia'
- 'Detyopsis belongs to Fulgoridae'
- 'Detyopsis packardi belongs to Detyopsis'
- 'Detyopsis scudderi belongs to Detyopsis'
- 'Dilaropsis belongs to Fulgoridae'
- 'Dilaropsis ornatus belongs to Dilaropsis'
- 'Diomonus belongs to Mycetophilidae'
- 'Diomonus palaeospilus belongs to Diomonus'
- 'Empididae belongs to Diptera'
- 'Eobracon belongs to Braconidae'
- 'Eobracon cladurus belongs to Eobracon'
- 'Eocalopteryx belongs to Agrionidae'
- 'Eocalopteryx atavina belongs to Eocalopteryx'
- 'Eopimpla belongs to Ichneumonidae'
- 'Eopimpla grandis belongs to Eopimpla'
- 'Eopodagrion scudderi belongs to Eopodagrion'
- 'Eothereva belongs to Therevidae'
- 'Eothereva simplex belongs to Eothereva'
- 'Erythroneura belongs to Cicadellidae'
- 'Erythroneura eocenica belongs to Erythroneura'
- 'Fulgoridae belongs to Homoptera'
- 'Gonomyia belongs to Tipulidae'
- 'Gonomyia scudderi belongs to Gonomyia'
- 'Hammapteryx belongs to Fulgoridae'
- 'Hammapteryx ceryniiformis belongs to Hammapteryx'
- 'Hammapteryx lepidoides belongs to Hammapteryx'
- 'Harpalus belongs to Carabidae'
- 'Harpalus veterum belongs to Harpalus'
- 'Homoptera was reranked as a order and belongs to Insecta'
- 'Hydroptila belongs to Hydroptilidae'
- 'Hydroptila phileos belongs to Hydroptila'
- 'Hymenoptera belongs to Insecta'
- 'Ichneumonides is corrected as Ichneumonidae and belongs to Hymenoptera'
- 'Lema belongs to Chrysomelidae'
- 'Lema pervetusta belongs to Lema'
- 'Lema vetusta is recombined as Crioceris vetusta'
- 'Limnephilidae belongs to Trichoptera'
- 'Limnephilus belongs to Limnephilidae'
- 'Limnephilus eocenicus belongs to Limnephilus'
- 'Lithopsis belongs to Fulgoridae'
- 'Lithopsis delicata belongs to Lithopsis'
- 'Lithopsis simillima belongs to Lithopsis'
- 'Musca ascarides is recombined as Lithohypoderma ascarides'
- 'Mycetophilidae belongs to Diptera'
- 'Palaeoplatyura eocenica belongs to Palaeoplatyura'
- 'Paleoplatyura [misspelled as Palaeoplatyura] belongs to Culicidae'
- 'Philorites belongs to Blepharoceridae'
- 'Philorites pallescens belongs to Philorites'
- 'Phygadeuon belongs to Ichneumonidae'
- 'Phygadeuon petrifactellus belongs to Phygadeuon'
- 'Pimpla belongs to Ichneumonidae'
- 'Pimpla eocenica belongs to Pimpla'
- 'Plecia belongs to Bibionidae'
- 'Plecia winchesteri belongs to Plecia'
- 'Podagrion is replaced by Megapodagrion'
- 'Protamphipteryx belongs to Odonata'
- 'Protamphipteryx basalis belongs to Protamphipteryx'
- 'Protoedalea belongs to Empididae'
- 'Protoedalea brachystoma belongs to Protoedalea'
- 'Protoliarus belongs to Fulgoridae'
- 'Protoliarus humatus belongs to Protoliarus'
- 'Scoparidea belongs to Fulgoridae'
- 'Scoparidea nebulosa belongs to Scoparidea'
- 'Syrphiae is corrected as Syrphidae and belongs to Diptera'
- 'Syrphus belongs to Syrphidae'
- 'Syrphus lithaphidis belongs to Syrphus'
- 'Therevidae belongs to Diptera'