Sp. 1. Memythrus Vespiformis.—Sphinx Vespiformis, Linn. Syst. Nat. II. p. 804, n. 31. Ægeria Asiliformis of Fabricius, and other authors.
Characters from the imago.
Palpi black, yellow at the apex; antennæ black, beneath testaceous; fulvous at the base; head black, excepting a white mark before each eye; a yellow ring round the neck; thorax black, with a yellow spot at the base of each superior wing; abdomen black, slightly barbate, with three equidistant yellow belts; superior wings deep fuscous, inferior hyaline; femora and anterior tibiæ black, posterior tibiæ and all the tarsi yellow.
Inhabits England, but is very rare.
Sp. 2. Memythrus crabroniformis.—Sesia crabroniformis, Lasp.
Inhabits Italy.
Sp. 3. Memythrus crassipes.—Sphinx crassipes, Drury.
Inhabits Africa.
Sp. 4. Memythrus tibialis.—Ægeria tibialis, Fab.
Sp. 5. Memythrus ——?—Unnamed in the Linnæan cabinet.