Araneides of the United States. 227 



tivo in the. centre^ usually blacky three on each side, leaving a 

 space above and below opened towards the middle ones ; feet, 

 1. 4. 2. 3. 



Habits. Araneides sedentary, forming a tube of silk in 

 the crevices of old walls, with loose threads spread out round 

 the orifice, the spider usually watching at the entrance. 



Observations. The characters derived from the cheliceres, 

 which are articulated together so as to allow of little or no re- 

 ciprocal motion, is peculiar to this subgenus. On the whole, it 

 seems to have a greater affinity to Clotho than to any of the 

 Tetrapneumones of Latreille ; and, by its habits, it is closely 

 related to my Pylarus and to Segestrta. Independent of the 

 difficulty of ascertaining the pulmonary orifices, these points 

 of affinity between Dipneumones and Tetrapnedmon.2s show 

 that the distinction may prove an artificial one. 



1. FILISTATA HIBERNALIS. 



Description. Deep mouse-colored, covered with fine short 

 hair ; cephalothorax darker ; cheliceres small. Male pale 

 grey or livid ; palpi excessively long, two middle eyes black, 

 the others shining white. 



Observations. It makes a tubular habitation of silk in 

 crevices on old walls or rocks, throwing an irregular web 

 which is spread on the wall or stone around the aperture. It 

 comes out occasionally during the winter, but cold is apt to 

 render it torpid, and it then remains several days in the sam'3 

 situation, moving slightly in the middle of the day. In walk- 

 ing, it uses its palpi like feet, and these organs are very long, 

 particularly in the male. I saw one of this species change 

 its skin in confinement. It had previously lost a leg by some 

 accident, but after moulting, it had a new one which had all 

 its joints, only a little shorter than the natural size ; its 

 cocoon is spherical. 



Habitat. South Carolina on the sea-coast, North Alabama 

 on the banks of the Tennessee. 



PI. VIII. Fig. 9, Filistata hibernalis. $ . a. Its trophi, with the palpi of llie 

 $ . b. Its eyes. 



