18e (18c'). Thorax with tegulae unmarked gray.
Sphinx chersis-- Great ash sphinx
18e'. Thorax with tegulae bi-colored, white and brownish-black.
*Sphinx canadensis-- Canada sphinx
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Last updated: 09/11/03 Gerald M. Fauske Research Specialist NDSU 202 Hultz Hall Fargo, ND 58105 E-Mail: Gerald.Fauske@ndsu.nodak.edu
Published by the Department of Entomology
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