INSECTS. 



103 



Order I. Chilognatha. In the Millepedes (Fig. 120), 

 the body is cylindrical, each segment bearing two pairs of 



Compound eye. . 



Antenna 



FIG. 120. A common millepede. The line underneath the figure represents 

 the length of the specimen from which the drawing was made. A, a 

 magnified view of the head of the milleped represented above. , a 

 magnified view of the left jaw. (After Morse.) 



legs. They are vegetable feeders, and harmless. The 

 eggs are laid in the earth, and the larva at first has only 

 three pairs of legs (Fig. 121). Spi- 

 rostrephon, from the Mammoth Cave, 

 is covered with hair. 



Order II. Pauropoda. The 

 Pauropus has only six segments be- 

 sides the head. The young have 

 three pairs of feet. 



Order III. Chilopoda. The 

 Centipedes (Fig. 122) attain a length 

 of ten or twelve inches, and have a 

 flattened body composed of from 



30 to 200 joints or segments. In some the eyes are sim- 

 ple ocelli ; in others they are compound. The Scolopen- 

 dra heros is extremely poisonous, the glands being in the 

 two large fangs (Fig. 123). Cermatia forceps, of the Mid- 

 dle and Southern States, is also said to be poisonous. 



FIG. i2i. Highly magni- 

 fied figure of a very 

 young millepede, short- 

 ly after hatching from 

 the egg. 



