On JVorth American Spiders. 101 



species was found in North Carolina. It is of a glossy brown, ex- 

 cept the abdomen, which is piceous. The palpi are so elongated as 

 to have all the appearance of legs. 



FiLisTATA? (Latr.) 



Eyes 8, nearly equal in size, ^"o o^ ; legs 1 . 4. 2. 3. lingua sur- 

 rounded by the maxillee, which are bent and pointed at their apex. 

 The mandibulse (cheliceres) are united together, so as to have no re- 

 ciprocal motion, except by means of their teeth, which are very short. 

 This is a remarkable character, which induces me to believe this may 

 not belong to Filistata, and in that case must be the type of a new 

 genus. These spiders form white silk tubes, in walls and crevices of 

 rocks ; the orifices of those tubes are spread and closely fixed on the 

 edges of the stones which make their abodes. I kept several alive 

 under glass, and witnessed the reproduction of their legs. The part 

 torn off does not grow gradually 5 but when the spider casts its skin, 

 that part comes out with all its joints from the skin, only somewhat 

 shorter than it was before. It is important to observe that, owing to 

 this fact, the character derived from the respective lengths of the legs, 

 is often deceptive, as spiders in their conflicts often lose their legs, and 

 frequently offer the characters of two different genera on that account. 

 It is therefore necessary to compare many specimens and the two 

 sides of the spider ; but that excpUent character ought not to be giv- 

 en up. One species. 



Dysdera, (Latr. Walck.) 



Eyes 6, oj" % ; legs 1. 2. 4. 3. lingua truncated. One species. A 

 male and a female were sent to me by Dr. T. W. Harris, one of the 

 most accurate and indefatigable entomologists in this country, who 

 found them in a cavity under ground. 



' Segestria? (Latr.) 



Eyes 6, '^0° °<p ; legs 1. 2. 4. 3. lingua longer than broad; max- 

 illae elongated, narrower above. One species, which is found under 

 the bark of trees in silk tubes. I marked this with a point of interro- 

 gation, because Latreille in his last work* excludes this from his 



* Families Natuvelles du rt-gnc animal. Paris, 1825. 1 Vol. 8vo. 



