ORDER IV.—MOTHS AND BUTTERFLIES. 189 
Most of the hawk-moths are seen only during some hours 
after sunset, but some smaller genera are also seen flying 
about during the day. Notwithstanding this, Linnzeus calls 
them all evening butterflies. 
The Poraro-worm Hawk-mora, or FIVE-SPOTTED 
SPHINX (Sphinx quinque-maculatus), Fig. 44, is a large green 
caterpillar, with oblique white stripes on each side; when 
full grown, it is more than three inches long. It is found 
not only on the potato-vine, but also on the tomato and 
ege plants; and it also feeds upon the leaves of every spe- 
cies of the solanum, or night-shade tribe. Here it is found 
from July to September, when it digs its winter retreat 
several inches below the surface of the ground, and there 
metamorphoses itself into a brown chrysalis, upon which 
may be distinctly seen the long case of its proboscis, resem- 
bling somewhat the handle of a pitcher. 
The Five-spotted Hawk-moth issues from this chrysalis 
in May or June. It is of a grayish color, and its body is 
ornamented with five orange-colored spots on each side. 
Its wings expand nearly five inches. Its head is provided 
with two cylindrical antennz, and a proboscis or tongue, 
which is almost entirely concealed when not in use, but 
which can be unrolled, like the spring of a watch, to the 
length of five or six inches. This proboscis consists of two 
parts, which can easily be separated, but which, when united 
together as usual, forms a hollow tube, through which the 
animal is enabled to suck the nectar of flowers, and with 
which it also produces a humming sound by rubbing it 
upon the diminutive glassy membrane at its base. 
There is no insect that possesses a voice; and when we 
hear sounds produced by insects, we may know that they 
originate from friction of some external parts of the body, 
as is the case, for instance, with some of the Capricorn 
beetles, who rub the joints of the head against the thorax ; 
or with grasshoppers, who produce a sound by bringing 
