Synonyms and other taxonomic changes
Sphinx franckii Neumoegen, 1893
Explanation of Names
Named in honor of Brooklyn entomologist George Franck
Forewing is gray along the costal half, yellowish brown on the rest of the wing; with black dashes and a black line along the outer margin. Hindwing is black with a narrow brown median band and base.
Holotype male: Kansas City, Missouri (from the collection of George Franck).
One flight from June-July in the north, sometimes a partial second brood from August-September in the south.
Larval hosts hosts are primarily elm (Ulmus
) and ash (Fraxinus
). Also recorded on California privet
Adults take nectar.
Females lay eggs singly on the host plant. Newly-hatched caterpillars eat at least part of their eggshells. Fully-grown caterpillars pupate in underground cells.
Uncommon and northern populations are in decline (Wagner, 2012). (2)
Neumoegen, B., 1893. Description of a new Sphinx
and some notes on S. coloradus
Smith. Entomological News, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia
Smyth, E.A., 1912. Description of the larva and first bred specimens of Sphinx (Hyloicus) franckii
Neum. (Lepid.). Entomological news, and proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia
Wagner, D.L., 2012. Moth decline in the northeastern United States. News of the Lepidopterists’ Society 54: 52–56.