306 NORMAN E. M'lNDOO. 



in total darkness. Several were seen at "6," 100 feet from the 

 mouth. An adult male was observed on the roof at "14"; nine 

 days later, it was seen under a rock on the floor and had con- 

 structed a snare. One immature specimen was seen in a branch 

 at "23." At "30," 200 feet from the entrance of Lower Twin, 

 a few live, and at "32" and "33" they are quite numerous. 



May 17, I collected eighteen Metas and placed them on the 

 north wall by a large pile of rocks at "19" in the "Big Room." 

 August 3, I saw six of them. They had scattered along the wall 

 about 50 feet and among the rock pile. Each had built an orb- 

 web and remains of small diptera were seen in the snares. August 

 17, after a brief search I saw only three of the eighteen. This 

 absence does not mean that they had died, but that it was im- 

 possible to find them. 



LOCOMOTION. 



This arachnid is very agile and is a good runner. Its long 

 legs and slender body enable it to move from place to place, 

 and to avoid an obstacle with much ease. When not irritated 

 it moves along slowly and gently. When stimulated mechan- 

 ically, it gives a quick jump, runs and dodges whatever obstacle 

 may be in its way. However, it runs only a few inches and if 

 stimulated a second or third time often drops in an instant and 

 hangs to its web. Sometimes it climbs the web to the place 

 from which it dropped, at other times it lets itself down to the 

 floor and then runs off. 



Several were placed on the roof among beads of water and other 

 small obstacles. A pencil was used to stimulate and guide them 

 so that they were obliged to run up against the obstacles. They 

 use the first pair of legs as feelers. These are kept well in advance 

 of the other legs and head so that they can detect an object in 

 front of them the length of the body. While walking or running 

 slowly, they are able to dodge an object every time. If caused 

 to run swiftly, they run against the object, or if the object be 

 a low bead of water, they run over it and pass on. 



WEBS AND SNARE. 



This spider usually spins a web wherever it goes. It is im- 

 possible to see a single thread in the cave with a carbide bicycle 



