Harris' Checkerspot (Chlosyne harrisii [Scudder])
Wing span: 1 7/16 - 2 inches (3.6 - 5.1 cm).
Identification: Upperside is orange with black markings. Underside of hindwing has a red-orange stripe at the margin and a red-orange, white, and black checkered pattern on remainder of wing.
Life history: Females lay eggs in clusters under host plant leaves. Caterpillars feed on leaves communally in a web. Partially-grown caterpillars hibernate at the base of the host plant.
Flight: One brood from June-July.
Caterpillar hosts: Flat-topped white aster (Aster umbellatus).
Adult food: Flower nectar.
Habitat: Moist areas such as marshes, bog edges, pastures, and meadows.
Range: Maritime Provinces west to Manitoba, south to West Virginia, southern Ohio, and northeastern Illinois.
Conservation: Not usually required.
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 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.
Author: Jane M. Struttmann
State and Regional References:
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. 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. 1966. Butterflies of the Delaware Valley. American Entomological Society Special Publication. Philadelphia, PA. 79 pp. Tietz, H.M. 1952. The Lepidoptera of Pennsylvania. The Pennsylvania State College School of Agriculture Agricultural Experiment Station. State College, PA. 194 pp. Wright, D.M. 1995, Atlas of Pennsylvania Butterflies. Special Private Publication, Lansdale, PA. 22 pp.