286 Catalogue of North American Sphinges. 
ted beneath. Palpi pressed close to the face, short, thick, and obtuse, with the 
third joint minute and concealed. Body thick ; abdomen conical and not tufted at 
the end. Flight crepuscular. Larve colored, naked, with a caudal horn, which 
is sometimes obsolete and replaced by a callous spot; they devour the leaves of 
plants, and go deep into the earth to transform, or conceal themselves upon the 
surface, under leaves, in an imperfect cocoon. 
The North American genera in this family are six. 
Genus I.—Smerinthus. 
Wings more or less angular and indented, the front margin of the hind-wings 
projecting beyond the upper or fore-wings when at rest. Antenne short, prismat- 
ical and fusiform, arcuated or curved near the tip, transversely biciliated or bipec- 
tinated beneath inthe males. Tongue obsolete. I granulated, wit the hea 
triangular, horned on the tail, obliquely banded on each side, and transforming in 
earth. 
the 
Genus I].—Ceratomia. 
Wings entire. Antenne elongated, abruptly ending ina short and slender hook, 
transversely biciliated beneath in the males. Palpi horizontal and nearly cylin- 
drical. Tongue moderate. Abdomen longitudinally striped. Larva with horns 
on the fore-part of the body, a row of little teeth on the back, a long caudal horn, 
and oblique bands on each side; it transforms in the earth. 
Genus II.—Sphinx. 
Wings entire. Antenne long, abruptly ending in a short and slender hook, and 
transversely biciliated beneath i 
-~ 
Genus V.—Cheerocampa. 
Wings sinous or angulated. Antenne rather short and slender, generally srene” 
ted, tapering, and ending ina long hook; more rarely straight, with a short termi 
