116 



ZOOLOGY 



The scorpions (Fig. 119) and their alhes are more primitive 

 than the spiders, since their bodies are longer and more worm- 

 hke. The abdomen is divided into two regions: in front, a 

 broader and, behind, a narrower called the post abdomen. 

 The scorpions are animals of the tropics and of the deserts, 



Fig. 117. 



— Attus, a jumping spider. 

 From Emerton. 



Fig. lis. — Young Lycos.n about 

 to fly. From Emerton. 



and are found during the day under sticks and stones. Their 

 thick skin enaljles them to re.sist the dry air of the desert which 

 tends to wather all it touches. The tip of the tail bears a 

 sting. Into this sting a poison sack empties. The wound of 

 the large scorpions, such as are found in the tropics, is fatal 

 to many animals upon which the scorpion preys. The wound 

 is very painful to man and occasionally fatal. We have only 

 one species of scorpion (Bu'thus) in our Southeastern States, 

 but there are several species in the southwest. 



