The ticks are parasitic on many forms of animals. The 

 common cattle tick (Fig. 4) occurs on domestic cattle, while 



similar forms attack dogs, 

 goats and fowls. They often 

 transmit diseases, and on this 

 account, in addition to being 

 parasites they are the cause of 

 serious loss. 

 b 



The red spider (Fig. 5) is a 

 good example of the mites 

 which attack plants, feeding 

 on leaves, fruits and bulbs. 



The Myriapoda, Class III, 

 include the centipedes and 

 the millipedes (Figs, b and 7.) 

 These are elongate animals 

 with segmented bodies and 

 jointed limbs and appendages. 



. ruachnid. A red 

 spider. 



(a) adult ; (b) palpus ; (c) claw. 

 Enlarged. (From U. i'. Dejjt. 



Agric.) 



thorax and the abdomen do not differ in structure, 

 body is generally provided with legs throughout 

 length, one or two pairs to each segment. 



The Centipedes (Fig. 6) are predaceous in habit. They are 

 also venomous, and by means of the strong fangs formed by 



The head is distinct from the 

 rest of the body, but the 

 The hind 

 its entire 



Fig. 6. Myriapod. A Centipede. 

 Reduced. (Or igina I . ) 



the modified first pair of legs are able to inflict painful 

 and sometimes dangerous wounds. 



