North American Butterflies and Moths List

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The Registry of Nature Habitats

U.S. Geological Survey

Butterflies of North America

Jalapus Cloudywing (Achalarus [Thessia] jalapus)

Jalapus Cloudywing (Achalarus jalapus [Plötz])

Wing span: 1 5/8 - 1 7/8 inches (4.2 - 5 cm).

Identification: Upperside is dark brown; forewing has dark rectangular spots. Male forewing has a costal fold enclosing scent scales. Hindwing is lobed at the rear and has white fringe. Underside of hindwing is dark brown with 2 darker bands.

Life history: Not reported.

Flight: Many broods in Mexico; strays to South Texas in July and September-October.

Caterpillar hosts: Not reported.

Adult food: Flower nectar.

Habitat: Tropical forests, especially near streams.

Range: Colombia north through Central America to Mexico. Strays north to the lower Rio Grande Valley, Texas.

Conservation: Not necessary for a rare stray.

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: None reported.


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

Jalapus Cloudywing (Achalarus [Thessia] jalapus)
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