| Agriades glandon Prunner, 1798 | 'Glandon' Arctic Blue |
| Agriades rustica rustica | Arctic blue |
| Agriades zullichi Hemming, 1933 | Zullich's Blue |
| Aricia (Icaricia) lupini Boisduval, 1869 | Lupine Blue |
| Aricia (Icaricia) saepiolus Boisduval, 1852 | Greenish Blue |
| Aricia (Icaricia) shasta W.H. Edwards, 1862 | Shasta Blue |
| Atlides halesus Cramer, 1779 | Giant purple hairstreak |
| Atlides halesus estesi Clench, 1942 | Great blue hairstreak |
| Brephidium exile (Boisduval, 1852) | ⇒ Brephidium exilis Boisduval, 1852 |
| Brephidium exilis Boisduval, 1852 | Fea Pygmyblue |
| Callophrys (Callophrys) affinis (Edwards, 1862) | ⇒ Callophrys dumetorum Boisduval, 1852 |
| Callophrys affinis affinis W. H. Edwards, 1862 | Western Green Hairstreak |
| Callophrys affinis apama Edwards, 1882 | Apama Hairstreak |
| Callophrys (Callophrys) comstocki (Henne, 1941) | ⇒ Callophrys sheridanii Carpenter, 1877 |
| Callophrys comstocki comstocki | Desert green hairstreak |
| Callophrys (Callophrys) dumetorum Boisduval, 1852 | 'Bramble' Bramble Hairstreak |
| Callophrys (Callophrys) gryneus Hübner, 1819 | |
| Callophrys (Callophrys) sheridanii Carpenter, 1877 | 'Alpine' Sheridan's Hairstreak |
| Callophrys sheridanii comstocki (Henne, 1940) | ⇒ Callophrys sheridanii Carpenter, 1877 |
| Callophrys (Cisincisalia) spinetorum Hewitson, 1867 | Blue Mistletoe Hairstreak |
| Callophrys (Incisalia) augustinus Westwood, 1852 | Brown Elfin |
| Callophrys (Incisalia) eryphon Boisduval, 1852 | Western Pine Elfin |
| Callophrys (Incisalia) fotis Strecker, 1877 | Arizona Gray Elfin |
| Callophrys (Incisalia) polios (Cook & Watson, 1907) | ⇒ Callophrys polia Cook & Watson, 1907 |
| Callophrys (Mitoura) gryneus Hübner, 1819 | 'Loki' Juniper Hairstreak |
| Callophrys (Mitoura) spinetorum Hewitson, 1867 | |
| Callophrys grynea siva | |
| Callophrys polia Cook & Watson, 1907 | Hoary elfin |
| Callophrys sheridani WH Edwards, 1877 | Small green hairstreak |
| Callophrys sheridani neoperplexa | Sheridan´s green hairstreak |
| Callophrys siva chalcosiva (H.K. Clench, 1981) | ⇒ Callophrys gryneus Hübner, 1819 |
| Calycopis cecrops Fabricius, 1793 | Red Banded Hairstreak |
| Castalius mindarus Felder & Felder, 1865 | |
| Celastrina argiolus Linnaeus, 1758 | Atlantic azure |
| Celastrina argiolus radon Cramer, 1780 | Spring azure |
| Celastrina echo (Edwards, 1864) | ⇒ Celastrina argiolus Linnaeus, 1758 |
| Celastrina ladon (Cramer, 1780) | ⇒ Celastrina argiolus Linnaeus, 1758 |
| Celastrina ladon echo Edwards, 1864 | Spring azure |
| Celastrina neglecta W.H. Edwards, 1862 | Summer Azure |
| Celestrina ladon | Spring Azure |
| Chlorostrymon simaethis Drury, 1773 | Key Lime Hairstreak |
| Cupido (Everes) amyntula Boisduval, 1852 | Western tailed blue |
| Cupido agriades | |
| Cyaniris neglecta Edwards, 1862 | |
| Cyanophrys amyntor Cramer, 1775 | Amyntor Greenstreak |
| Deciduphagus augustinus (Westwood, , 1852) | ⇒ Callophrys augustinus Westwood, 1852 |
| Echinargus isola (Reakirt, 1867) | ⇒ Habrodais poodiae J.W. Brown &..., 1982 |
| Elkalyce comyntas Godart, 1823 | |
| Euphilotes ancilla (Barnes & McD..., 1918) | ⇒ Euphilotes enoptes Boisduval, 1852 |
| Euphilotes battoides Behr, 1867 | 'Bernardino' Square-spotted Blue |
| Euphilotes baueri (Shields, 1975) | ⇒ Euphilotes battoides Behr, 1867 |
| Euphilotes bernardino Barnes & McD..., 1916 | Bernardino Blue |
| Euphilotes bernardino martini Mattoni, 1954 | Bernardino dotted-blue |
| Euphilotes ellisi (Shields, 1975) | ⇒ Euphilotes battoides Behr, 1867 |
| Euphilotes ellisii (Shields, 1975) | ⇒ Euphilotes battoides Behr, 1867 |
| Euphilotes enoptes Boisduval, 1852 | 'Dammer's ' Dotted Blue |
| Euphilotes enoptes ancilla Barnes & McD..., 1918 | Ancilla Dotted Blue |
| Euphilotes mojave (Watson & Com..., 1920) | ⇒ Euphilotes enoptes Boisduval, 1852 |
| Euphilotes pallescens (Tilden & Downey, 1955) | ⇒ Euphilotes rita W. Barnes & ..., 1916 |
| Euphilotes pallescens emmeli Shields, 1975 | Pallid Blue |
| Euphilotes pallescens pallescens Tilden & Downey, 1955 | Pallid Blue |
| Euphilotes rita W. Barnes & ..., 1916 | 'Pale' Rita Blue |
| Euphilotes rita pallescens Tilden & Downey, 1955 | 'Pale' Rita Blue |
| Euphilotes spaldingi Barnes & McD..., 1917 | Colorado-Plateau Blue |
| Euphilotes stanfordorum Opler & A. W..., 2009 | Stanfords´ Blue |
| Everes amyntula (Boisduval, 1852) | ⇒ Cupido amyntula Boisduval, 1852 |
| Glaucopsyche lygdamus Doubleday, 1842 | Behr Blue |
| Glaucopsyche lygdamus colombia Skinner, 1917 | Northwestern silvery blue |
| Glaucopsyche lygdamus oro Scudder, 1876 | Silvery Blue |
| Glaucopsyche piasus Boisduval, 1852 | Arrowhead Blue |
| Glaucopsyche piasus daunia W. H. Edwards, 1871 | Arrowhead Blue |
| Habrodais grunus Boisduval, 1852 | Golden Hairstreak |
| Habrodais poodiae J.W. Brown &..., 1982 | Baja Hairstreak |
| Harkenclenus titus (Fabricius, 1793) | ⇒ Satyrium titus Fabricius, 1793 |
| Hemiargus ceraunus Fabricius, 1793 | Antillean Blue |
| Hemiargus ceraunus gyas Edwards, 1871 | Ceraunus Blue |
| Hemiargus isola Reakirt, 1866 | Alce Blue |
| Hemiargus isola alce Edwards, 1871 | Blackspotted solitary blue |
| Heodes helloides | |
| Hypaurotis citima (Edwards, 1881) | ⇒ Hypaurotis crysalus Edwards, 1873 |
| Hypaurotis crysalus Edwards, 1873 | Colorado hairstreak |
| Hypaurotis crysalus citima H. Edwards, 1881 | Colorado Hairstreak |
| Icaricia acmon (Westwood, 1851) | ⇒ Plebejus acmon Westwood, 1851 |
| Icaricia icarioides Boisduval, 1852 | Boisduval's blue |
| Icaricia lupini (Goodpasture, 1973) | ⇒ Aricia lupini Boisduval, 1869 |
| Icaricia saepiolus W. H. Edwards, 1863 | Greenish blue |
| Icaricia shasta (Edwards, 1862) | ⇒ Aricia shasta W.H. Edwards, 1862 |
| Incisalia augustinus (Westwood, 1852) | ⇒ Callophrys augustinus Westwood, 1852 |
| Incisalia augustinus annetteae | Brown elfin |
| Incisalia augustinus iroides (Boisduval, 1852) | ⇒ Callophrys augustinus Westwood, 1852 |
| Incisalia eryphon (Boisduval, 1852) | ⇒ Callophrys eryphon Boisduval, 1852 |
| Incisalia eryphon eryphon | Western pine elfin |
| Incisalia fotis (Strecker, 1878) | ⇒ Callophrys fotis Strecker, 1877 |
| Incisalia fotis fotis | Desert elfin |
| Incisalia polia obscurus Ferris & Fisher, 1973 | Hoary elfin |
| Jamides cyta zelia Fruhstorfer, 1916 | |
| Leptotes marina Reakirt, 1868 | Marine Blue |
| Lycaeides melissa (Edwards, 1873) | ⇒ Plebejus melissa Edwards, 1873 |
| Lycaena (Chalceria) editha Mead, 1878 | Edith's copper |
| Lycaena editha montana Field, 1936 | Edith´s copper |
| Lycaena (Chalceria) heteronea Boisduval, 1852 | Blue Copper |
| Lycaena heteronea heteronea Boisduval, 1852 | Blue Copper |
| Lycaena (Chalceria) rubidus Behr, 1866 | 'White Mountains' Ruddy Copper |
| Lycaena rubidus sirius W. H. Edwards, 1871 | Ruddy Copper |
| Lycaena (Chalceria) xanthoides Boisduval, 1852 | Gray Copper |
| Lycaena (Epidemia) dorcas Kirby, 1837 | 'Maine' Dorcas Copper |
| Lycaena dorcas castro Reakirt, 1866 | Dorcas Copper |
| Lycaena dorcas helloides | Purplish copper |
| Lycaena (Epidemia) dospassosi (McDunnough, 1940) | ⇒ Lycaena dorcas Kirby, 1837 |
| Lycaena (Epidemia) helloides Boisduval, 1852 | Common purplish copper |
| Lycaena (Epidemia) hyllus Cramer, 1775 | Bronze Copper |
| Lycaena (Epidemia) nivalis Boisduval, 1869 | Brown Copper |
| Lycaena nivalis browni dos Passos, 1938 | Lilac-bordered Copper |
| Lycaena (Lycaena) cupreus (W. H. Edwards, 1870) | ⇒ Lycaena cuprea W. H. Edwards, 1870 |
| Lycaena cupreus artemisia | Lustrous copper |
| Lycaena cupreus snowi W. H. Edwards, 1881 | 'Snow'S' Lustrous Copper |
| Lycaena (Lycaena) phlaeas Linnaeus, 1761 | American Copper |
| Lycaena phlaeas polaris Courvoisier, 1911 | Arctic-alpine boreal copper |
| Lycaena (Tharsalea) arota Boisduval, 1852 | Tail Copper Butterfly |
| Lycaena arota schellbachi Tilden, 1955 | Schellbach´s Copper |
| Lycaena acmon (Westwood, 1851) | ⇒ Plebejus acmon Westwood, 1851 |
| Lycaena clarki Dickson, 1971 | Eastern Sorrel Copper |
| Lycaena cuprea W. H. Edwards, 1870 | Lustrous copper |
| Lycaena cuprea snowi WH Edwards, 1881 | Alpine lustrous copper |
| Lycaena eurymus | |
| Lycaena exilis (Lucas, 1889) | ⇒ Brephidium exilis Boisduval, 1852 |
| Lycaena rubida sirius WH Edwards, 1871 | Rockymountain ruddy copper |
| Lysandra syngrapha Keferstein, 1851 | |
| Ministrymon leda Edwards, 1882 | Lead Hairstreak |
| Mitoura gryneus (Hübner, 1816) | ⇒ Callophrys gryneus Hübner, 1819 |
| Mitoura siva (Hübner, 1819) | ⇒ Callophrys gryneus Hübner, 1819 |
| Mitoura siva chalcosiva Clench, 1981 | Coppery juniper hairstreak |
| Mitoura siva siva | Juniper hairstreak |
| Mitoura spinetorum (Hewitson, 1867) | ⇒ Callophrys spinetorum Hewitson, 1867 |
| Penaincisalia incisalia (J.F. Le Crom..., 1997) | ⇒ Penaincisalia swarthea Le Crom & K...., 1997 |
| Philotes pallescens (Tilden & Downey, 1955) | ⇒ Euphilotes rita W. Barnes & ..., 1916 |
| Philotiella speciosa H. Edwards, 1877 | Pumice Dotted-Blue |
| Plebejus (Agriades) aquilo Boisduval, 1832 | Arctic Blue |
| Plebejus (Agriades) glandon de Prunner, 1798 | Arctic Blue |
| Plebejus glandon rusticus WH Edwards, 1865 | Rocky Mountain Arctic Blue |
| Plebejus acmon lutzi dos Passos, 1938 | Rockymountain silverstudded blue |
| Plebejus (Icaricia) icarioides (Boisduval, 1852) | ⇒ Icaricia icarioides Boisduval, 1852 |
| Plebejus icarioides ardea WH Edwards, 1871 | Boisduval´s blue |
| Plebejus (Icaricia) lupini (Boisduval, 1869) | ⇒ Aricia lupini Boisduval, 1869 |
| Plebejus lupini lutzi Passos, 1938 | Lupine blue |
| Plebejus (Icaricia) shasta (Edwards, 1862) | ⇒ Aricia shasta W.H. Edwards, 1862 |
| Plebejus shasta minnehaha Scudder, 1874 | Minnehaha Blue |
| Plebejus (Lycaeides) idas Linnaeus, 1761 | |
| Plebejus idas annette WH Edwards, 1882 | Wasatch northern blue |
| Plebejus (Lycaeides) melissa Edwards, 1873 | Common bordered blue |
| Plebejus melissa annetta W. H. Edwards, 1882 | Melissa Blue |
| Plebejus melissa melissa W. H. Edwards, 1873 | Melissa Blue |
| Plebejus (Plebejus) idas (Linnaeus, 1761) | ⇒ Plebejus idas Linnaeus, 1761 |
| Plebejus (Plebejus) saepiolus (Boisduval, 1852) | ⇒ Lycaena clarki Dickson, 1971 |
| Plebejus saepiolus gertschi dos Passos, 1938 | Greenish blue |
| Plebejus saepiolus saepiolus Boisduval, 1852 | Greenish blue |
| Plebejus (Plebijides) pylaon (Fischer von ..., 1832) | ⇒ Kretania pylaon Rambur, 1839 |
| Polyommatus eros eros (Ochsenheimer, 1808) | ⇒ Polyommatus eros Ochsenheimer, 1808 |
| Sarthusia sarthus ophion Hemming, 1933 | |
| Satyrium (Satyrium) behrii W.H. Edwards, 1870 | Behr's hairstreak |
| Satyrium (Satyrium) calanus Hübner, 1806 | Banded Hairstreak |
| Satyrium (Satyrium) californica Edwards, 1862 | California Hairstreak |
| Satyrium (Satyrium) fuliginosa (Edwards, 1861) | ⇒ Satyrium fuliginosum W.H. Edwards, 1861 |
| Satyrium (Satyrium) liparops Le Conte, 1833 | Striped Hairstreak |
| Satyrium (Satyrium) saepium Boisduval, 1852 | Buckthorn Hairstreak |
| Satyrium saepium latalinea (Austin & Savage, 1998) | ⇒ Satyrium titus Fabricius, 1793 |
| Satyrium saepium okanagana | |
| Satyrium saepium provo (Watson & Com..., 1920) | ⇒ Satyrium saepium Boisduval, 1852 |
| Satyrium (Satyrium) sylvinus (Boisduval, 1852) | ⇒ Satyrium sylvinum Boisduval, 1852 |
| Satyrium sylvinus putnami H. Edwards, 1877 | Putnam'S Hairstreak |
| Satyrium (Satyrium) titus Fabricius, 1793 | Coral Hairstreak |
| Satyrium titus immaculosis | Coral hairstreak |
| Satyrium behri behri | Behr´s hairstreak |
| Satyrium behri crossi Field, 1938 | Rockymountain orange hairstreak |
| Satyrium calanum godarti Field, 1938 | Western banded hairstreak |
| Satyrium californicum WH Edwards, 1862 | California Hairstreak |
| Satyrium fuliginosum W.H. Edwards, 1861 | Sooty Hairstreak |
| Satyrium fuliginosum semiluna | Sooty hairstreak |
| Satyrium mirabelle (W. Barnes, 1900) | ⇒ Satyrium ilavia Beutenmüller, 1899 |
| Satyrium putnami S.H. Scudder, 1876 | |
| Satyrium sylvinum Boisduval, 1852 | Sylvan hairstreak |
| Satyrium sylvinum putnami Hy Edwards, 1877 | Utah willow hairstreak |
| Strymon melinus Hübner, 1818 | Common hairstreak |
| Strymon melinus franki (W. D. Field, 1938) | ⇒ Strymon melinus Hübner, 1818 |
| Strymon saepium Boisduval, 1852 | |
| Strymon sylvinus Boisduval, 1852 | |
| Strymon titus immaculosus WP Comstock, 1913 | Immaculate coral hairstreak |
| Thecla amyntor (Cramer, 1779) | ⇒ Cyanophrys amyntor Cramer, 1775 |
| Thecla biston (Möschler, 1876) | ⇒ Bistonina biston Möschler, 1877 |
| Thecla euptychia Draudt, 1920 | |
| Thecla heodes Druce, 1909 | |
| Thecla mirabelle Barnes, 1900 | |
| Tomares ballus ballus Fabricius, 1787 | |
