Theclinae
Guides
Allosmaitia strophius
Strophius Hairstreak
Allosmaitia strophius, the Strophius Hairstreak, is a small Neotropical hairstreak butterfly in the family Lycaenidae. It ranges from southern Brazil northward through Central America to Sinaloa, Mexico, with occasional strays reaching Texas. Adults are active year-round in Central America, with Texas records limited to November. The species has a wingspan of 22–32 mm.
Atlides
Great Purple Hairstreak (for A. halesus)
Atlides is a genus of gossamer-winged butterflies in the family Lycaenidae, subfamily Theclinae, tribe Eumaeini. The genus contains approximately 18 named species plus 5 or more undescribed species distributed across the Americas from the southern United States to Argentina. The most well-known species, Atlides halesus (great purple hairstreak), is notable for its iridescent blue coloration—despite its common name containing "purple"—and its exclusive larval association with mistletoe species (Phoradendron). Males of at least some species possess androconial scales producing distinctive volatile compounds; A. polybe males emit a grape-like aroma from methyl anthranilate, the first such compound reported in Papilionoidea.
Callophrys affinis apama
Western Green Hairstreak
Callophrys affinis apama is a subspecies of the western green hairstreak butterfly, a small lycaenid found in western North America. It is one of several subspecies within the C. affinis complex, which shows geographic variation across its range. The species is associated with open habitats where its larval host plants grow. Adults are active in spring and early summer, with a rapid, low flight pattern typical of hairstreak butterflies.
Callophrys gryneus nelsoni
Nelson's Hairstreak, Nelson's Juniper Hairstreak
Callophrys gryneus nelsoni is a western North American subspecies of juniper hairstreak butterfly. Its taxonomic status has been debated, with some authorities treating it as a distinct subspecies while others have elevated it to full species rank as Mitoura nelsoni. DNA barcode studies indicate it is genetically divergent from other C. gryneus populations, though the magnitude of divergence is comparable to that seen between other recognized species in the genus. Adults are associated with juniper woodlands.
Callophrys gryneus rosneri
Rosner's Hairstreak, Juniper Hairstreak
Callophrys gryneus rosneri is a subspecies of juniper hairstreak butterfly in the family Lycaenidae. It is currently recognized as a synonym of Mitoura gryneus in GBIF taxonomy, though iNaturalist maintains it as a distinct subspecies under Callophrys. The taxon was described by K. Johnson in 1976. Like other juniper hairstreaks, it is associated with juniper host plants.
Callophrys gryneus smilacis
juniper hairstreak, olive hairstreak
Callophrys gryneus smilacis is a subspecies of juniper hairstreak butterfly in the family Lycaenidae. The subspecies is currently treated as a synonym of Mitoura gryneus in some taxonomic databases. Adults are associated with juniper and hackberry-bumelia-juniper woodland habitats. The species has been documented in Oklahoma and Vermont, with observations in late August. The taxonomic status of this subspecies remains unsettled, with conflicting treatments across sources.
Callophrys lanoraieensis
bog elfin
Callophrys lanoraieensis, the bog elfin, is a small North American butterfly in the family Lycaenidae. It is a habitat specialist restricted to peatland ecosystems dominated by black spruce and tamarack. The species has a limited distribution in the northeastern United States and eastern Canada, with isolated populations across its range. Its small size, dull brown coloration, and lack of hindwing tails distinguish it from related elfin species.
Callophrys niphon clarki
Callophrys niphon clarki is a subspecies of the eastern pine elfin butterfly, a member of the family Lycaenidae. The parent species, Callophrys niphon, is native to North America. This subspecies was described by T. Freeman in 1938. According to GBIF records, this name is currently treated as a synonym under the genus Incisalia as Incisalia niphon. Very few observations (4) of this subspecies have been recorded in iNaturalist, suggesting it is either rare, poorly surveyed, or taxonomically merged with related forms.
Calycopis
groundstreaks, hairstreaks
Calycopis is a genus of small butterflies in the family Lycaenidae, commonly known as groundstreaks or hairstreaks. The genus contains numerous species distributed across the Neotropical and Nearctic realms. A controversial taxonomic revision by Kurt Johnson in 1991 proposed extensive splitting of the genus, but most modern authors reject these changes as unjustified. Species within Calycopis are typically associated with forest edges and disturbed habitats where their larval host plants occur.
Chlorostrymon
hairstreaks
Chlorostrymon is a genus of hairstreak butterflies in the family Lycaenidae, established by Clench in 1961. The genus comprises six recognized species distributed across the Nearctic and Neotropical realms, including the well-known silver-banded hairstreak (C. simaethis). Species within this genus are characterized by their association with the hairstreak tribe Eumaeini.
Electrostrymon guzanta
Electrostrymon guzanta is a neotropical hairstreak butterfly in the family Lycaenidae. The species occurs in Central and northern South America, where adults inhabit forested environments. Like other members of the genus, it exhibits the characteristic tail-like hindwing extensions typical of hairstreaks. The species was originally described by William Chapman Hewitson in 1877 under the genus Thecla.
Eumaeini
hairstreaks, elfin butterflies
Eumaeini is a diverse tribe of gossamer-winged butterflies (family Lycaenidae), typically placed in the subfamily Theclinae but sometimes treated as a separate subfamily Eumaeinae. The tribe contains over 1,000 described species, predominantly distributed in the Neotropical realm, with some representatives extending into the Nearctic region and isolated occurrences in the Palearctic. Members are commonly known as hairstreaks or elfin butterflies, characterized by often intricate wing patterns and, in many species, thin tail-like projections on the hindwings. The group has been subject to extensive taxonomic revision due to high species diversity and morphological complexity.
Panthiades
Panthiades is a genus of lycaenid butterflies in the tribe Eumaeini (hairstreaks). The genus comprises approximately eight described species distributed throughout the Neotropical region. At least one species, Panthiades bitias, has been documented as myrmecophilous, with immature stages exhibiting ant-associated behavior. Adults are generally small to medium-sized butterflies with the characteristic morphology of hairstreak butterflies.
Parrhasius m-album
white M hairstreak, White-M Hairstreak
Parrhasius m-album is a small hairstreak butterfly (wingspan 32–41 mm) with metallic blue upper wings and a distinctive silver underside marked by an M-shaped pattern. Females are larger than males. The species is strongly associated with oak habitats throughout the southeastern and central United States.
Phaeostrymon
Phaeostrymon is a genus of hairstreak butterflies (Lycaenidae: Theclinae) established by Clench in 1961. It belongs to the tribe Eumaeini, one of the most diverse groups within the subfamily. The genus contains species distributed in the Neotropical region. Members exhibit the characteristic tail-like hindwing projections typical of hairstreaks.
Satyrium californicum
California Hairstreak
Satyrium californicum is a species of hairstreak butterfly in the family Lycaenidae. It belongs to a genus of small butterflies whose larvae typically feed on oaks and other woody plants. Adults in this genus often exhibit canopy-dwelling behavior and may utilize non-nectar food sources such as honeydew and plant exudates. The specific ecology of S. californicum has been less documented than some congeners, though it shares the genus-typical association with ant mutualists and woody host plants.