23 



centre, usually black, three on each side, leaving a space above 

 and beloiv opened toivards 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 too-ether so as to allow of little or no 

 reciprocal 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 Segestria. Independent of the 

 difficulty of ascertaining the pulmonary orifices, these points of 

 affinity between Dipneumones and Tetrapneumones show that 

 the distinction may prove an artificial one. 



1. Filistata hibernalis. 



PI. 2, fig. 6. ?. a. Trophi, with the palpi of the male. ' b. Eyes. 



Description. Deep mouse-colored, covered with fine short 

 hair ; cephalothorax darker ; cheliceres small. Male, pale gray 

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

 others shining white. 



Observations. It makes a tubular habitation of silk in crev- 

 ices 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 tor- 

 pid, and it then remains several days in the same situation, 

 moving slightly in the middle of the day. In walking, 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 con- 

 finement. 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. 



[<?, length, 13.8 mm.; cephalothorax, 6.2 mm.; legs, 23, 19, 15.6, 20.6. 

 Fernandina, Fla., Sept. 1, with cocoon of young. E. Palmer, j. n. k.] 



