Author Affiliations +
William H. Clark,* Arnold Van Pelt,** Raymond Skiles***
*Orma J. Smith Museum of Natural History, Albertson College of Idaho, Caldwell, Idaho 83605, bclark@albertson.edu
**203 Howell Place, Greensboro, NC 27455
***National Park Service, P.O. Box 129, Big Bend National Park, Texas 79834