North American Butterflies and Moths List

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Butterflies of North America

Mexican Bluewing (Myscelia ethusa)
JPG -- species photo

Mexican Bluewing (Myscelia ethusa [Boisduval])

Wing span: 2 1/2 - 3 inches (6.4 - 7.6 cm).

Identification: Forewing apex is truncated. Upperside is black with iridescent blue bands; outer half of forewing has white spots.

Life history: Young caterpillars make a resting perch by attaching dung pellets and silk to a leaf vein. The adults rest on tree trunks with wings closed, exposing their undersides which look like bark.

Flight: Many flights throughout the year in South Texas.

Caterpillar hosts: In the tropics, Dalechampia in the spurge family (Euphorbiaceae).

Adult food: Rotting fruit.

Habitat: Stream valleys with dry scrub or scattered tropical forest.

Range: Colombia north through Central America to Mexico. Periodically strays and lives in the lower Rio Grande Valley, Texas.

Conservation: Conserve remaining Tamaulipan brushland habitats in the lower Rio Grande Valley, Texas.

The Nature Conservancy Global Rank: G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.

Management needs: Expand the lower Rio Grande Valley refuge complex. Protect existing habitats on refuges.


Opler, P. A. and V. Malikul. 1992. A field guide to eastern butterflies. Peterson
     field guide #4. Houghton-Mifflin Co., Boston. 396 pages, 48 color plates.

Scott, J. A. 1986. The butterflies of North America. Stanford University Press, 
     Stanford, Calif. 583 pages, 64 color plates.

Author: Jane M. Struttmann

Mexican Bluewing (Myscelia ethusa)
distribution map
map legend

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