PART II. 

 ARTHROPODA EXCLUSIVE OF THE INSECTS. 



CHAPTER XVIII. 

 NEAR RELATIVES OF INSECTS. 



Myriapoda Millipeds and Centipeds. 



These are air-breathing arthropods, having the head 

 distinct from the thorax. The thorax and the abdomen 

 form one continuous region with from six to two hundred 

 segments in different representatives, each segment 

 bearing at least one pair of legs. The millipeds and the 

 centipeds constitute a class of the Arthropoda, some of 

 which are harmless, some harmful, and some of them 

 of real benefit to mankind. 



Millipeds. 



These myriapods have two pairs of legs on each 

 segment of the body except the front three. The body in 

 most of the representatives is cylindrical, the antennae short 

 and few- jointed. Millipeds may be found in damp places, 

 under leaves, or when one turns over a stone or a board. 

 Occasionally one sees on the sidewalk a reddish-brown, 

 cylindrical "worm" ; and if you touch it, it will curl up and 

 lie perfectly motionless with the numerous legs on the 

 inside of the curl, as if to persuade you that it is dead 



231 



