INSECTS. 10% 
from the abdomen. Some are marine (Fig. 124). The 
lowest forms are parasitic in the lungs and liver of man, 
and in the horse and sheep. 
Order II. Scorpions (Pedipalfi).—In the scorpions 
the body is plainly segmented and large, the tail long and 
slender, ending in a curved sting (Fig. 125) that con- 
tains two poison-glands. They have crab-like claws, and 
breathe by lungs as well as traches. In Ceylon they at- 
tain a length of twelve inches, in Florida four. In striking, 
the tail is raised over the back and then struck down.* 
Fic. 125.—Scorpion with cricket in its claws, s, carapace; mc, mouth- 
claws; ~, mouth; @, poison-sting. 
The young are born alive, and cling to the mother. 
False or book scorpions (Chelifer) occur in books, under 
stones, and in the bark of trees. They have no poison- 
gland, and cast their skins in a delicate web, in which they 
* At Loggerhead Key, the extremity of the Florida reef, it is inter- 
esting to note that the scorpions have obtained a foothold and are very 
common, living in board-piles, coming out at night, frequently being 
found and killed in the house, the effect of the sting resembling that 
of the wasp. The so-termed suicide of the scorpion is similar to the 
action of a man tearing his hair or biting his tongue in agony, and 
self-destruction is an accidental result. 
