264 
THE LIVING WORLD. 
During exuviation, the larva changes its skin five times. It soon prepares 
to make its cocoon. On each side of the body are two slight vessels which 
secrete a yellow gum, which is drawn through the mouth in the form of 
threads. First making a foundation of irregular threads, it constructs upon 
LEMON BUTTERFi/v (Rhodocera rhamni). 
21. twelve-feathered moth (. Alucita 
hexadaciyla >. 7. hop spinner (He- 
pialus hutnuli). 
these a loose network of floss silk; finally it makes a firm yellow ball, the outside 
of which is smeared as a protection against the weather. After completing its 
task, it throws off its last skin and is metamorphosed into a chrysalis, which, 
at the end of a month, bursts forth as a moth, whose span of life does not 
exceed a few days. 
More fertile than rabbits, their families vary from two hundred to five 
hundred. They have stout, hairy bodies ; broad 
wings, which frequently are brilliant in coloring; 
lay upwards of three hundred eggs, and will 
feed upon the Osage orange equally as well as 
upon the mulberry. 
The Emperor Julius Caesar was a versatile 
and able man ; in oratory, inferior to Cicero alone; 
in military affairs, still supreme; in elegance and 
trustworthiness as an historian, unsurpassed; in 
political skill and forecast, without rival. Still, 
to the modern inheritor of the conquests of 
the past, Caesar appeals rather by his service¬ 
ableness, and among his benefits must be 
included not merely the reformation of the calendar, but the introduction of 
silk to the attention of the Romans, and consequently to the modern world. 
Fond of display, not so much for its own sake as for its political effect upon 
a wonder-loving, amazement-seeking people, he, at a cost which would have been 
incurred by no one but a Roman or an American, had constructed a silken 
tent, when the expensiveness of silk was proportionate to its rarity. This 
fabric was to become a necessity of human life, and to furnish employment for 
m 
m 
it 
iS 
oak leaf (Lasiocampa quercifolia ). 
