Cercyonis sthenele

Great Basin wood-nymph
	Cercyonis sthenele paulus, male
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Nymphalidae
Genus:	Cercyonis
Species:	C. sthenele
Binomial name
	Cercyonis sthenele; (Boisduval, 1852)
Synonyms
	Satyrus sthenele Boisduval, 1852[1];

Cercyonis sthenele, the Great Basin wood-nymph, is a North American butterfly in the family Nymphalidae.

Description

It is dark brown with two eyespots on the forewing with the upper larger than the lower.[2]

The wingspan measures 39–44 mm (1.5–1.7 in). Its flight period is from late June to late August.[3]

The following subspecies are recognised:[4]

Common wood-nymph (Cercyonis pegala) – larger, eyespots similar in size
Small wood-nymph (Cercyonis oetus) – lacks lower eyespot in males, lower eyespot is closer to margin than upper eyespot in females[3]

Ranges over much of the western United States and reaches to southern British Columbia, Canada.[3]

Larvae feed on various species of grass. The first instar hibernates.[3]

Butterflies of America
Brock, Jim P.; Kaufman, Kenn (2003). Butterflies of North America. New York, NY: Houghton Mifflin. ISBN 0-618-15312-8.
"Great Basin Wood-nymph". Canadian Biodiversity Information Facility. 2002. Retrieved 18 October 2010.
"Cercyonis Scudder, 1875" at Markku Savela's Lepidoptera and Some Other Life Forms

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