428 PROCEEDINGS OF THE ACADEMY OP [1890. 



median band with a narrow buff band on each side. The edges of 

 the median band are cut or toothed anteriorly and it contains several 

 pairs of buff spots in the posterior portion. The sides of the abdo- 

 men are dark brown ; beneath it is uniform buff. Legs buff, the 

 front pair in the male have the femur, patella, tibia and part of the 

 tarsus dark brown. Length of female 16 mm. 



This species is very common running in grass fields. The female 

 makes a nest under stones when carrying her egg bag. The eggs 

 are deposited during the latter part of August. Adult males were 

 collected during the first week in August. I have taken this species 

 in Philadelphia, Chester, Lancaster and York Counties, Penn. 



Genus TROCHOSA. 



This genus is quite similar to Lycosa but the cephalothorax is 

 lower and the sides of the head much more oblique. 

 T. cinerea (Fab.) 



General color very light gray nearly white (yellowish in alcohol). 

 Cephalothorax with a number of irregular radiating brown markings. 

 Eyes surrounded with black in alcohol but when dry the white hairs 

 conceal the black patch. Abdomen marked in the center with a 

 number of brown dots and patches of yellow hairs, with four short 

 narrow brown lines on the anterior part, and some irregular brown 

 lines on the dorsum. Beneath white. In alcohol there appears to 

 be an irregular brown median band with two rows of white spots 

 surrounded with brown. Legs white with black spines. Length of 

 female 15 mm. 



I have found this species only on the coast of New Jersey. Nearly 

 adult females were collected under boards and rubbish near the 

 beach on April 30th. On the night of Aug. 12th, 1889 while catching 

 Amphipods and other small Crustacea which abound on the beach 

 after dark, I caught a number of these spiders which appeared to 

 run down after the retreating waves in search of food. Some of these 

 were females that had already deposited their eggs while others were 

 not more than half grown. 



Genus PIRATA. 



The spiders of this genus are of rather small size. They bear con- 

 siderable resemblance to Lycosa but the upper spinnerets are longer 

 than the lower and the eyes of the middle row are very large and 

 prominent and are usually separated from each other by less than 



