114 
ZOOLOGY 
producing sickness, pain, and swelling in the part wounded, 
the sting of the scorpion is seldom fatal. 
The little false-scorpions {CliGlifer, Fig. 138) often occur 
in books, under the bark of trees, and under stones. The 
whip-scorpion is confined to warm countries; Thelyphonus 
giganteus occurs in New Mexico and Mexico. Its abdo- 
iuen ends in a long lash-like appendage. Its bite is poi- 
sonous. The harvest-men, or daddy-long-legs, are common 
Fig. 137.— Carolina Scorpion (J5/ff/iws Fig. ISS.—CheUfer can- 
Carolinianus). Natural size. vroidea. Magnified. 
in dark places about houses. They feed on plant-lice. Our 
common species is Plialangium dorsatum. 
Order 3. Araneina, — The spiders are always recognizable 
by their round abdomen, attached by a slender pedicel to 
the head-thorax. They breathe, like the scorpions, both 
by lungs as well as by tracheae, and the young resemble 
the parents in having four pairs of feet. The man- 
dibles end in hollow points, through which the poison 
exudes, the two poison-glands being situated in the head. 
