HAWK-MOTHS. 47 
about three and a half inches long, of a beautiful apple-green 
color, and with a lateral dark-brown or blackish stripe. On 
each side of the body there are seven broad, oblique, white 
bands, bordered in front with light purple. The breathing- 
‘pores are of a bright orange-yellow; the dark-brown horn 
is quite long and has a yellowish tint about the base at the 
sides. 
When not feeding this larva assumes the peculiar rigid 
position that has given this 
class of caterpillars the name 
of Sphinx.” Tit. is) quikesa. 
formidable looking insect, but 
Mie SO Satins dhapiferarien is perfectly harmless and can 
aiiiph ors: be handled with impunity. 
As soon as fully grown, it enters the ground, where at the 
depth of several inches it prepares a large and smooth cell, 
lined with some sort of water-proof cement, and there it 
changes to a reddish-brown pupa, about an inch and a half 
long, and with a short, thick and projecting tongue-case 
(Fig.50). The pupa remains in the ground until the follow- 
ing June. 
* Like all worms of this kind they soon show their pres- 
ence upon plum trees by the denuded twigs, and a vigilant 
fruit-grower should not be slow to find and exterminate this 
foe. Sometimes these caterpillars cause considerable dam- 
age in nurseries, and if found in large numbers, as is some- 
times the case, many young plum trees are killed. 
THE APPLE SPHINX. 
(Sphinx gordius Cram.). 
This moth (Fig.51, Plate VI), which expands from three 
to three and a half inches across the wings, is also found in 
Minnesota, but seems to be rather uncommon. It is found 
from late in May to the end of June. Its fore-wings are dark 
