Are the lower anal appendages more than half as long as the upper anal appendages?	Are the lower anal appendages less than half as long as the upper anal appendages?
Common Spreadwing Lestes disjunctus	Spotted Spreadwing Lestes congener

Written by Mark Lung and Stefan Sommer, 2000
Photos by Dennis Paulson, 2001
Illustrations courtesy of Robert Cannings, 2001.