Below are links to pages than illustrate butterflies in many of the sub-families of this class of insect. There is still debate over the exact number of butterfly sub-families, but current thinking suggests that there are around 20 within the seven overall families. 

Family Papilionadae (Swallowtails) Click below for the sub-families

Papilioninae (Swallowtails)

Family Hesperidae (Skippers) Click below for the sub-families

Hesperiinae (Grass Skippers)
Coeliadinae
Pyrginae

Family Nymphalidae (Brush-footed or four-footed butterflies) Click below for the sub-families

Satyrinae (browns)
Heliconiinae (longwings)
Danainae (milkweed butterflies)
Nymphalinae (Checkerspots, Peacocks, Anglewinds)
Biblidinae
Morphinae
Family Lycaenidae (Blues, Coppers and Hairstreaks) Click below for the sub-families
Polyommatinae (Blues)
Lycaeninae (Coppers)
Pieridae (Whites and allies) Click below for the sub-families
Coliadinae (Yellows)
Pierinae (whites)