520 



MY HI APOD A. 



the intermediate segments. TMliobius ftirjirafitx L.. with fifteen pairs of 

 Legs. 



Fam. Scutigeridse. The antennae are at least as long as the body. The Icp; 

 are long, their length increasing from before backwards. Facetted eyes instead 

 of ocelli. With a small number of free terga. Srnt'ujem coleojrtnitti, L., South 

 < in-many and Italy. 



Order '2. CHILOGNATHA. 



The shape of the body is cylindrical or subcylindrwal. There is a 

 four-lobed plate behind the mandibles, and two pairs of legs on each 

 segment (the anterior segments excepted). The genital openings are 

 on the coxal joint of the second pair of legs. 



The body of the Chilognatha is, as a rule, cylindrical or sub- 

 cylindrical. The segments have the form of complete rings, or are 

 provided with special dorsal plates. In many cases (Julid(e) the 

 body is much elongated ; in others (Glomeris) it is short, like that of 

 a wood-louse (tig. 427). The antenna? are short, and consist only 



of seven joints, 

 of which the last 

 may abort. The 

 mandibles are 

 provided with 

 broad masticating 

 i, Maxillae surfaces, which 

 serve to crush the 

 vegetable matters on which the animals feed, and with an upper 

 movably articulated pointed tooth. The maxilla? are united so as to 

 form an inferior buccal plate, the sides of which bear two rudimentary 

 hook-shaped blades (tig. 427, b), while the middle portion appears 

 to represent the underlip. The eyes, which as a rule consist of 

 aggregated simple eyes, are situated above and external to the 

 antenna?. The anterior thoracic legs are as a rule directed forwards 

 towards the mouth. The three thoracic segments, and sometimes 

 the next two or three segments, bear a single pair of legs. All the 

 others, except the seventh in the male, bear two pairs. Stigmata are 

 present in all the segments, and are more or less hidden beneath the 

 coxal joints of the limbs. The rows of pores (foramina repugnatoria) 

 on either side of the back, which are often taken for rows of 

 stigmata, are the openings of cutaneous glands, and secrete a cor- 

 roding fluid for the protection of the animal. The generative organs 

 open on the coxal joint of the second pair of legs, and in the male 

 sex there is also a paired copulatory organ present on the seventh 



FIG. 427. <t 



, Grlomeris marginata (after C. L. Koch). 

 (inferior buccal plate) of Jnlns terrettris. 



