Supriya Ghosh (Editor)

Leptotes cassius

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Kingdom  Animalia
Class  Insecta
Family  Lycaenidae
Scientific name  Leptotes cassius
Phylum  Arthropoda
Order  Lepidoptera
Genus  Leptotes
Rank  Species
Leptotes cassius Leptotes cassius cassidula live adults page 1
Similar  Leptotes, Hemiargus ceraunus, Strymon, Hemiargus, Ascia

Mariposas yuyera leptotes cassius

Leptotes cassius, the Cassius blue or tropical striped blue, is a butterfly of the Lycaenidae family. It is found in North America in Florida including the Keys, Texas south through the Caribbean, Mexico, and Central America to South America. Strays can be found in New Mexico, Kansas, Missouri and South Carolina.


Leptotes cassius Leptotes cassius cassidula live adults page 1

The wingspan is 20–35 mm.

The butterfly species has an important role in Marisha Pessl's 2006 novel Special Topics in Calamity Physics. The protagonist, Blue van Meer, is named in honor of the Cassius blue.

The caterpillars feed natively on Fabaceae. Food plants on record are Amorpha crenulata, woolly rattlepod (Crotalaria incana), Galactia regularis and lima bean (Phaseolus lunatus). It can also successfully develop feeding on Cape leadwort (Plumbago auriculata) or doctorbush (P. scandens), which (among the eudicots) are not closely related to its usual food plants.

Leptotes cassius cassiusblue1v030811keylargozjpg

Leptotes cassius parque ibirapuerasp br 12 11 2015 antonio silveira


  • L. c. cassius – Suriname
  • L. c. catilina
  • L. c. theonus (Lucas, 1857) – Florida, Cuba, Bahamas, Greater Antilles
  • L. c. cassidula (Boisduval, 1870) – Texas, Mexico, Honduras
  • L. c. cassioides – Windward Islands, including Dominica and Trinidad & Tobago
  • L. c. striata
  • L. c. theonus (and consequently L. cassius itself) is the type species of the genus Leptotes.


    Leptotes cassius Wikipedia