crepuscularia

from The Century Dictionary.

• In entomology, in Latreille's system, the second family of Lepidoptera; the sphinxes or hawk-moths, corresponding to the Linnean genus Sphinx, and divided into four sections, Hesperisphinges, Sphingides, Sesiasides, and Zygænides, corresponding to the Fabrician genera Castnia, Sphinx, Sesia, and Zygæna, and nearly to modern families of similar names.