114 



ZOOLOGY. 



producing sickness, pain, and swelling in the part wounded, 

 the sting of the scorpion is seldom fatal. 



The little false-scorpions {Ghelifer, Fig. 138) often occur 

 in books, under the bark of trees, and under stones. The 

 whip-scorpion is confined to warm countries; Thelyphonus 

 qiganteus occurs in New Mexico and Mexico. Its abdo- 

 men ends in a long lash-like ai^pendage. Its bite is poi- 

 sonous. The harvest-men, or daddy-long-legs, are common 



Fig. 137.— Carolina Scorpion {ButJius 

 Carolinianus). Natural aize. 



Fio. ISS.—Cheli/er can- 

 oroides. Magnified. 



in dark places about houses. They feed on plant-lice. Our 

 common species is Fhalangium dorsatum. 



Order 3. Arancina. — Tlie spiders are always recognizable 

 by tlieir round abdomen, attached by a slender pedicel to 

 the bead-thorax. Tliey breathe, like the scorpions, both 

 by lungs as well as by trachesB, and tiie young resemble 

 the parents in having four pairs of feet. The man- 

 dibles end in b.ollow points, through which the poison 

 exudes, the two poison-glands being situated in the head. 



