GRAPTA IV. 
After third moult (length .6 inch), which takes place two days later, the 
spines are greatly enlarged and lengthened. In from two to three days further 
(length .9 inch), the fourth and last moult occurs. From the third moult the 
larvae vary greatly, both in color of body and of spines. Some are black, finely 
specked with yellowish; others are yellow-brown, specked with yellow tubercles; 
others grey-brown with indistinct reddish lines between the spines on the dorsal and 
two lateral rows and much tuberculated ; others are black with fulvous stripes and 
profusely covered with yellowish tuberculated spots and points. The colors of the 
spines vary from black to fulvous and green and yellow. From four to five days 
after the last moult, the length having increased to 1.6 inch, the larva stops feed- 
ing and within twenty-four hours changes to chrysalis. Duration of the larval 
state about fifteen days. 
The chrysalids vary slightly in color, being in shades of brown clouded with 
olivaceous or lilac; sometimes a dark green stripe from the tail along the spiracles 
as far as the wing cases; in all, the surface is somewhat bronzed and decidedly on 
back of head and on the abdominal tubercles, excepting the four middle ones 
which are silvered; palpi cases prominent, and mesonotal process prominent, 
arched and thin. Duration of chrysalis state eleven days. 
