Chapter III: Part 3

Palpi very prominent, and densely clothed with scales at the base, in appearance angulated; antlia fine, not so long as the antennæ; antennæ the length of the thorax, in the male much pectinated, in the female simple; superior wings clothed with scales, inferior hyaline.

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.

Several other species probably exist, with which I have not happened to meet.

The principal distinctions between Memythrus and Ægeria are, that the antennæ in the former are not longer than the thorax; in the latter they are much longer; in the males of the former genus they are decidedly pectinated, in those of the latter but obscurely ciliated; in the former the anterior wings are always opaque, in the latter always hyaline.

_Natural Divisions to which the_ SPHINX VESPIFORMIS _of Linnæus is
referable._

FIRST PRIMARY GROUP ANIMALIA.
FIRST KINGDOM ANNULOSA.
CENTRAL SUB-KINGDOM INSECTA.
FIRST CLASS LEPIDOPTERA.
CENTRAL SUB-CLASS PHALÆNA.
SECOND NATURAL ORDER COSSI.
SECOND FAMILY ÆGERIIDÆ.
SECOND GENUS MEMYTHRUS.
FIRST SPECIES VESPIFORMIS.

FINIS.

R. CLAY, PRINTER, BREAD-STREET-HILL.

DIRECTIONS FOR PLACING THE DIAGRAMS.

1. The Classes of Insecta to face page 21.

2. The Sub-classes of Lepidoptera to face page 31.

3. The Natural Order of Cossi to face page 52.