348 



ARTICULATA : IXSECTA. 



FIG. 473. 



tins sub-order belong the so-called " Ear- 

 ' or Lithobiidse, which have a broad and 

 head and forty jointed antennae, and 



wigs 



flat 



which feed mainly upon earth-worms ; the 

 Centipedes or Scolopendridne, which have 

 from twenty-one to twenty-three feet-bearing 

 segments, and which in some species, as those 

 of the tropics, are six to nine inches long ; 

 and the Geophilidre (Fig. 474), characterized 

 by their slender form, and by their great 

 Earwig, Litiw- number of segments, varying in the different 



bius america. j j d f th j fc t t hundred. 



nus, Newport. ' 



FIG. 474. 



Geophilus bipuncticeps, Wood. 



2. THE SUB-ORDER OF CIIILOGNATHA is composed of myr- 

 iapods which have very short and few-jointed antennae, 

 very numerous segments, and each segment provided with 



FIG. 475. 



" Thousautl-legs," Julus canadensis, Newport. 



two pairs of feet. The name comes from the Greek 

 clieilos r lip, and gnathos, a jaw. 



To this group belong the "Thousand-legs" or Julida?, 

 which have the body nearly cylindrical, and made up of 

 nearly equal segments ; the Polydesmidse, which are 

 broad and flat ; and the Glomeridse, which have few seg- 

 ments, and which have the habit of rolling themselves 

 into a ball. 



