400 



PECKHAM. 



[\^0L. r. 



already turned away, but accidentally touching it with her leg, 

 returned and seized it. 



To further test how far they depended upon sight for finding 

 the cocoon we removed the egg-sacks from two specimens of 

 P. moiitanus, and, after coloring them scarlet and letting them 

 get thoroughly dry, placed them on a board near the mothers. 

 Both approached them several times, but, until they came into 



ROUTE FOLLOWED IN FINDING COCOON, 



BY 

 PARDOSA PALLIDA. 



actual contact with them, did not take them up. The instant, 

 however, that they were touched, they were- seized by the 

 mothers, and treated as affectionately as they had been before 

 they were colored. We repeated this experiment five times, 

 with the same results. 



Professor Auguste Forel, in discussing the sight of arthropods, 

 says that insects furnished with only simple eyes see but a short 

 distance, more distinctly when an object is in motion, very im- 

 perfectly when it is at rest. Regarding spiders, he remarks that 

 if you take up one of the ground-spiders (probably one of the 

 Lycosidae) carrying its eggs, and remove the cocoon to a dis- 

 tance of two or three inches, she will hunt about for it, and have 

 the greatest difficulty in finding it. He also observes that jump- 



