INSECTS INJURIOUS TO THE ORANGE. 



379 



or less dotted with brown ; another suiiilar white or cream- 

 colored })atch, with brownish dots, covers the posterior por- 



FiG. 390. 



tion of the body. Behind tiie head there are two long, red, 

 fleshy horns, which can be protruded at will, and these, when 

 extended, emit a very 



disagreeable odor, which Fig. 391. 



probably serves to protect 

 the caterpillar from its 

 enemies. The under side 

 of the body is of a brown- 

 ish color. The larva com- 

 pletes its growth in about 

 a month, when it changes 

 to a chrysalis. Tiiis is 

 nearly an inch and a half 

 long (see Fig, 391), irreg- 

 ularly forked at its upper end, with a prominent point upon 

 its breast, and a loop of silk around the middle ; the hinder 

 extremity is also fastened to the supporting twig or branch, 

 hooked in a tuft of silk. Its color is gray and brown, of 



