46 



BOARD OP AGRICULTURE. 



animal, they instantly leave the plant and quickly disperse 

 over their host. They insert their glossoids and mandibles into 

 the skin, where they cling firmly by means of the numerous 

 hooks, and live by sucking the blood. The abdomen soon be- 

 comes very much swollen, and sometimes grows so large as to 

 resemble a tumor. They attack various animals and even man, 

 indiscriminately. In many parts of the Southern States the 

 " wood ticks " are extremely troublesome to persons who have 

 occasion to go into the forests, as well as to animals. The 

 eggs of Ixodes alhipictus are laid in large masses, from the 

 first of May until the last of June. Early in July the eggs 

 hatch out simultaneously, " the shell opening like a clam." 

 The young when first hatched have six slender legs. 



Figure 41. Figure 42. 



Figure 44. 



Figure 43. 



The Cattle-tich {Ixodes bovis'). Figure 41. 

 This is a flattened, leathery, reddish, seed4ike species, with 

 an oblong-oval body. It sometimes grows to be nearly half 

 an inch long. It infests cattle, and is very troublesome in the 

 Western and Southern States, but is far less common in the 

 North. It also attacks the horse and many other quadrupeds, 

 as well as reptiles, including the rattle-snake. 



Figure 41. — Cattle-tick {Ixodes bovis Riley), enlarged. 



Figure 42 — Ixodes alhiptctns Packard ; six-legged young, much enlarged ; d, 

 foot with sucker. 



Figure 43. — Head of the same, more enlarged; a, glossoid;6, mandibles ; c 

 maxillary palpi. 



Figure 44. — Adult of the same, gorged with blood, natural size. All from 

 Packard's Guide. 



