UITES AND SCORPIONS. 



113 



< >i;m i:- "I Ai: m IIM1>\. 



1. Body small, rounded ; no distinct abdonn M 



-.' Bodj with a jointed abdomen Vrthr 



:\ Body with a thick un jointed abdomen. . 



Order 1. Acarina.— The mil are the sim- 



ple8i Axachnida, the body being oval in form, the head 

 ally small, more or less merged with the thorax, while 

 the latter is not separate from the abdomen. The 



Fig. 186 Sugar mite. 

 Much • 





(Fig. L36) is a large mite. It infests rattle, sometimes 

 burying itself in the skin of human bein< 



Ord( ' "-' I ihrogastra. — This group embraces tin 

 pion ( Fig. 131 }, the false-scorpions, the whip-scorpions, and 

 the harvest-men ( Ph I. In all t ! ■ 



domen is plainly segmented, the segments not being visible 

 in the mites or spiders. Usually the maxillary palpi are 

 much enlarged, and end in claws. Tl rpion is vivipa- 



rous, the young being brought forth alive. The youi 

 pious cling to the back of the mother. the 



scorpion is lodged in the tail, which is perforated, and 

 tains in the bulbous enlargement an active poison. Though 



