1890.] NATURAL SCIENCES OF nilLADELPHIA. ' 425 



L. arenicola, ScuiUler. 



Scudder, Psyche II, p. 2. 



^[cCook, Pruc. Acad. Nat. Sci., Phila., p. 333. 



Marx, Amer. Naturalist 1881, p. 396. 



Above light gray, quite silvery in young specimens. The cepha- 

 lothorax has a Avide central band, which, however, is often indis- 

 tinct, as the hairs rub off very easily, leaving the cephalothorax 

 shining reddish-brown. The abdomen has a dark median band 

 running its entire length, much cut or toothed on the edges, and 

 including several pairs of small gray spots behind. The legs are 

 gray, the front ones darkest and blackish beneath. The under side 

 of the abdomen is gray, -with a black spot around the spinnerets. 

 Length of female, 17 mm. 



This species I have met with only in the sandy districts of New 

 Jersey, especially near the coast. Here they make tube-like bur- 

 rows in the sand, usually lining them with silk. Numerous speci- 

 mens were collected at Pt. Pleasant August 13th, 1888. Both 

 males and females were found in the holes, but only one spider in 

 each. The females were not fully grown, and had not yet deposited 

 their eggs. The tubes were made in the loose sand, and were eight 

 to ten inches deep, with a slight silky lining inside, but no collection 

 of sticks or rubbish around the opening. My friend, Mr. A. P. 

 Brown, made a careful study of these spiders at the same locality 

 some years before, and states that most of the burrows examined 

 by him had silky linings which extended out from the mouth of the 

 hole, and the sand adhering to them formed flaps. These flaps, he 

 noticed, were always drawn over the hole during rain or high wind, 

 nearly covering the mouth of it, and serving as a protection to the 

 spider within. Burrows situated in grassy localities some distance 

 from the beach often had a few pieces of grass or small sticks col- 

 lected around the mouth, but nothing like the turrets found by Dr. 

 Marx, Dr. McCook, or Mr. Scudder. (For interesting accounts of 

 these turrets see references above.) 



The spiders inhabiting the sand-hills had the opening situated at 

 the top of a slight mound, which seemed to serve as an additional 

 protection fi'om the particles of drifting sand. Adult females 

 covered with young were taken from the holes in Septelnber. 



L. polita, Emerton. 



Above, cephalothorax smooth and shining, dark reddish -brown, 

 with an indistinct lighter area extending from the eyes to the dorsal 



