ARACHNIDS FROM OHIO VALLEY CAVES. 185 



Cave. According to the guide this locality is two and one half 

 miles from the entrance. Concluding from the number of webs 

 at this place, Meta must be common. Since Meta is an outside 

 form and is ordinarily never found very far from the entrance of 

 a cave, there is evidently an opening somewhere near this place. 

 Here as elsewhere in this cave, cave crickets, small diptera and 

 blind beetles were often seen. 



Scotolemon flavescens Cope. This cave harvestman was very 

 abundant in Wyandotte. They were found some distance from 

 the entrance on the damp floor where visitors walk, and often 

 at the base of damp stalagmites. They were always found in 

 the same places as thysanurans and where candle drippings were 

 common. They probably eat the candle drippings and each 

 other, for three couples were seen righting and several were found 

 dead. They are the least active arachnids I have ever seen and 

 are not affected by carbide light. The second pair of legs, ex- 

 ceedingly long, are used as tactile organs. Several individuals 

 of this species were caught in Little Wyandotte. 



Phalangodes armata Tellkampf. Two specimens of this cave 

 harvestman were taken in Mammoth Cave, one at River Styx 

 and the other at end of main cave. It is much larger and more 

 active than the preceding species. It is usually found on the 

 walls and not on the floor. 



Chtonius Packardii Hagen. One specimen of this small semi- 

 blind pseudoscorpion was taken in Wyandotte, two in Little 

 Wyandotte and one in Mammoth. I have also taken it in 

 Shawnee Cave. It is usually found under damp rocks. It 

 moves along slowly with its chelae held in the air in front, and is 

 very difficult to find. 



In order to keep the specimens from any of these caves alive 

 very long, it was necessary to place them in a saturated atmo- 

 sphere. They were most conveniently kept in small vials. One 

 individual with a drop of water was placed in each vial. In such 

 confinement several died in a few days, but the majority sur- 

 vived for a month or more. Light experiments like those with 

 Troglohyph antes were prosecuted with Theridium porteri Banks 

 and Erigone infernalis Keys., collected in Mayfield's Cave. They 

 were decidedly negatively phototropic. Various outside forms 



