Straight-lined Sulphur
Common NameStraight-lined Sulphur
Scientific NameEurema proterpia
FamilyPieridae
SubfamilyColiadinae
Wingspan (mm)40
Wing Patternsolid
Primary Colorspale yellow, greenish-yellow
HabitatArid scrub, desert washes, open woodlands, fields, roadsides
Geographic RangeSouthwestern United States, Mexico, Central America, and northern South America
Host PlantsSenna species, various legumes
Flight PeriodYear-round in southern parts of its range; late summer to fall in northern migratory areas
Conservation Statusleast-concern
Lifecycle NotesEggs are laid singly on host plant leaves. Caterpillars are green with a pale lateral stripe, feeding on legumes. Pupae are green and attached to stems.
Identification TipsKey features include the pointed forewing apex, the overall pale yellow or greenish-yellow coloration, and the prominent straight veins on the hindwing underside.
Description
A medium-sized butterfly with pale yellow to greenish-yellow wings, characterized by a distinctly pointed forewing apex and faint, straight, yellowish-brown veins visible on the underside of the hindwing.
