THE DYSDERID^ 



23 



the openings of the lungs. The cephalothorax and legs are 

 orange brown, darker toward the front. The abdomen is the 

 same color, but so pale as to be almost white. 



Ariadne bicolor. — Six eyes in three pairs, the side pairs 

 separated by their diameter from the middle pair. The length 

 is about a third of an inch, the 

 cephalothorax and abdomen about 

 the same length. The cephalo- 

 thorax is long and the head wide. 

 The maxillae are long and narrow. 

 The sternum is widest opposite the 

 third legs (fig. 74), and ends behind 

 in a blunt point. The first, second, 

 and third legs are directed forward, 

 the first pair longest and stoutest. The 

 tibiae of the first and second legs are a little 

 thickened in the middle and have four pairs 

 of spines on the under side, and the meta- 

 tarsus of the same legs eight pairs. The 

 hinder pairs of spinnerets are very small. 

 The cephalothorax and legs are yellow brown, 

 darker toward the front. The abdomen is 

 purplish brown, darker in the middle and 

 toward the front. In the male the head is 

 more narrowed and the front legs longer. 

 The front metatarsi are curved at the base 

 and have a tooth each side, the inner one 

 farthest from the tibia. The palpal organ is outside the tarsal 

 joint, as it is in the Mygales. • 



I'iGS. 73, 74. Ariadne bi- 

 color. — 73, upper side 

 enlarged four times. 

 74, under side. 



