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Butterflies of North America

Butterflies of New York

Long Dash (Polites mystic)
JPG -- species photo

Long Dash (Polites mystic [W. H. Edwards])

Wing span: 1 1/8 - 1 1/2 inches (2.9 - 3.8 cm).

Identification: Upperside is dark brown with reddish to yellowish orange markings. Forewing of female has a broad black patch at the base; male forewing has a long, slightly curved stigma which may be connected to the dash near the apex (creating a "long dash"). Underside of hindwing is orange-brown with a curved band of equal-sized yellow spots.

Life history: Males perch in low grassy spots, streambeds, or swales during most of the day; courtship occurs in mid- to late afternoon. Females deposit eggs singly on or near the host plant. Caterpillars feed on leaves and live in shelters of tied leaves. Fourth-stage caterpillars hibernate.

Flight: One brood from late May to early August.

Caterpillar hosts: Bluegrasses (Poa species).

Adult food: Nectar from flowers including common milkweed, selfheal, mountain laurel, and tick trefoil.

Habitat: Open, moist areas including meadows, marshes, streamsides, wood edges, and prairie swales.

Range: Southern British Columbia east to Nova Scotia; south to Washington, Idaho, Colorado, Nebraska, Iowa, northern Illinois, West Virginia, Virginia, and New Jersey.

Conservation: Not usually required.

The Nature Conservancy Global Rank: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.

Management needs: None reported.

References:


Opler, P. A. and G. O. Krizek. 1984. Butterflies east of the Great Plains. Johns 

     Hopkins University Press, Baltimore. 294 pages, 54 color plates.



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.



Stanford, R. E. and P. A. Opler. 1993. Atlas of western USA butterflies including 

     adjacent parts of Canada and Mexico. Denver and Fort Collins, CO. 



Tilden, J. W. 1986. A field guide to western butterflies. Houghton-Mifflin Co., 

     Boston, Mass. 370 pages, 23 color plates.

Author: Jane M. Struttmann

State and Regional References:


Cech, R. 1993.  A Distributional Checklist of the Butterflies and Skippers of 

     the New York City Area (50-mile Radius) and Long Island.  New York City 

     Butterfly Club Special Publication.  27 pp.



Forbes, W.T.M.  1960.  Lepidoptera of New York and Neighboring States.  Part 

     IV: Agaristidae through Nymphalidae Including Butterflies.  Cornell Univ. 

     Agricultural Experimental Station, Ithaca, N.Y.  Memoir 371.  188 pp.



Glassberg,  J.  1993.  Butterflies Through Binoculars: A Field Guide to 

     Butterflies in the Boston-New York-Washington Region.  Oxford Univ. Press, 

     New York, N.Y.  160 pp. 



Klass, C. and Dirig, R.  1992.  Learning about Butterflies.  Cornell Cooperative 

     Extension Publication, 4-H Member/Leader Guide 139-M-9.  Ithaca, N.Y.  

     36 pp.



Layberry, R.A., Hall, P.W. & Lafontaine, D.J., 1998.  The Butterflies of 

     Canada.  University of Toronto Press, Toronto, ON.  280 pp.

     

Opler, P.A. 1998. A field guide to eastern butterflies, revised format.

     Houghton Mifflin Co., Boston.      



Shapiro, A.M.  1974.  Butterflies and Skippers of New York State.  Cornell Univ.

     Agricultural Experimental Station, Ithaca, N.Y.  Search 4:1-60.   

Long Dash (Polites mystic)
distribution map
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