Sphingidae 
Genus AMPHION Hubner 
Head small. Eyes small, hemispherical. Palpi rather short. 
Tongue nearly as long as the body. Antennae fusiform with a 
long curved hook at the tip. Body plump, somewhat globose, 
the thorax projecting very little beyond the insertion of the 
primaries, and the abdomen terminating in a conspicuous fan-like 
tuft. The fore wings are comparatively short and narrow, exca¬ 
vated on the outer margin below the apex and above the inner 
angle, which is strongly produced. The inner margin is deeply 
sinuate. The hind wings are bluntly lobed at the anal angle. 
There is only one species in the genus. 
(i) Amphion nessus Cramer, Plate II, Fig. 18, $ . (The 
Nessus Sphinx.) 
This species, which may easily be recognized from the figure 
on the plate, is not uncommon in the Middle States. It ranges 
from Canada to Georgia and westward to Wyoming. It flies in 
the daytime on cloudy days and in the late afternoon before sun¬ 
set. The caterpillar feeds on Ampelopsis and the wild grape. 
Genus POGOCOLON Boisduval 
This small genus, which is closely related in many structural 
respects to Proserpinus , differs from it very decidedly in the form 
as well as in the habits of the insects belonging to 'it. In the 
structure of the antennae and neuration of the wings the insects 
belonging to Pogocolon show a close relationship to the insects 
referred to the genus Proserpinus , but the form of the abdomen 
is wholly different, elongated, cylindrical, and not bombyliform. 
The moths, moreover, are crepuscular, whereas the moths re¬ 
ferred to the genus Proserpinus are diurnal in their habits, in this 
respect resembling the species of the genus Hcemorrhagia. 
There are at least three species belonging to this genus. 
(i) Pogocolon gaurae Abbot & Smith, Plate II, Fig. n, $. 
(The Gaura Sphinx.) 
The upper side of this small species is sufficiently delineated 
in the plate to require no verbal description. On the under side 
the wings are vinous brown, shading on the outer third into 
olive-green, and reproducing the maculation of the upper surface. 
The hind wings are deep olive at the base, passing into yel¬ 
lowish green outwardly. 
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