141 



of silk in the crevices of walls, protected from the sun and rain. 

 This very distinct subgenus has some affinity to Theridion. 



Thalamia parietalis. 



PI. 15, fig. 16. 



Description. Obscure ; cephalothorax pale, with a bifur- 

 cated blackish line ; abdomen with several dusky small spots ; 

 feet slender, 2. 3. 4. 1. 



Observations. This very active little spider dwells in crev- 

 ices of walls, in narrow tubes with an orifice, which serve as 

 nets to arrest its prey. It was discovered and delineated by 

 Charles A. Hentz. 



Habitat. South Alabama." 



Scytodes cameratus. 



PI. 15, fig. 17. 



Descrijjtion. Pale testaceous ; cephalothorax large, with 

 various curved dusky lines ; abdomen varied with dusky dots 

 and lines; feet with dusky rings; 1. 4. 2. 3. 



Observations. This spider, which dwells in almost total 

 darkness, in closets among rubbish, does not make any visible 

 web, though it obviously belongs to the genus Scytodes of 

 Latreille. It is most commonly found in the folds of old rags 

 or refuse papers, and shows but little activity in its movements, 

 evidently avoiding the light. 



Habitat. North Alabama. 



[The nails of the cheliceres are very minute ; lip wide, 

 lanceolate ; maxillas as in Filistota : last joint of palpi more 

 slender than the rest. Taken from April to November. SujJ- 

 plement.~\ 



[V, length 5.6 mm. ; cephalothorax 3 mm.; legs 10, 8.2, 6.9, 9.5. 

 Salem, Mass., June 16, Museum cellar; Aug. 4, in upper room; Boston, 

 Mass., in library, near book cases ; Troy, N. Y. j. h. e. 

 Scytodes thoracica Walckenaer, Apteres.] 



