i6 
THE STUDY OF INSECTS. 
some time, attached by their pincers to all portions of her 
body. 
Scorpions live in warm countries. They are common in 
the southern portion of the United States, but are not found 
in the North. They are nocturnal, remaining concealed dur¬ 
ing the day, but leaving their hiding-places at dusk. When 
they run the post-abdomen is bent upwards over the back. 
They feed upon spiders and large insects, which they seize 
with the large pincers of their palpi, and sting to death with 
their caudal poison sting. 
The sting of a scorpion rarely if ever proves fatal to man, 
although the larger species, which occur in the Tropics, pro¬ 
duce serious wounds. 
Nearly twenty species are known from North America. 
Order SOLPUGIDA (Sol-pu'gi-da). 
The Jointed Spiders. 
The members of this order differ from all other Arach- 
nida in having the head separate from the thorax, and in 
having the thorax composed of 
three distinct segments, as with 
insects. The mandibles are very 
large, and are furnished with 
strong pincers. The palpi are 
shaped like the legs, and are said 
to be used in locomotion. The 
first of the four pairs of true legs, 
like the palpi, are not furnished 
with claws, and are used as palpi. 
There are only two eyes. Respi¬ 
ration is effected by means of 
„ . tracheae, which open through three 
Fig. 9.—A Jomted-spider, Datames # , 1 0 
diiatata. (After Putnam.) pairs of spiracles, situated in the 
first thoracic and the second and third abdominal segments. 
Only a few species of Solpugida occur in the United 
States, and specimens of these are rarely found. So far 
