206 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 1, NO. 4. 
white spot is formed on the cephahc plate. There are also white 
lines extending from the anterior lateral eyes to the dorsal eyes 
on each side. From Oregon, Utah and New Mexico. 
P. simplex. 
The abdomen has longitudinal central and side bands light- 
colored with dark bands between. On the sides of the cephalo- 
thorax the hairs are white ; the lower margin has a black line 
between two white lines. From Vera Cruz, Mexico. 
P. griseiis. 
The abdomen is grey, with a central white band on the posterior 
part, on the sides of which are oblique chestnut-colored bars. The 
cephalothorax has on its margin a black line between two white 
lines. From Utah. 
P. candidus. 
There is no light basal band on the abdomen, which is entirely 
covered with yellowish-grey hairs. There are white hairs on the 
sides and posterior thoracic slope of the cephalothorax. From 
Utah. 
P. carolinensis. 
The abdomen is velvety black, with markings of a bright pink- 
ish and salmon-color. Clypeus white, with a chestnut-colored 
band running outward from each of the middle eyes, not reach- 
ing the margin. The third leg is longer than the fourth by 
little more than the tarsus. From South Carolina. 
P. sabiilosus. 
The abdomen is black, mottled with gray, with a lighter basal 
band running on to the sides. Clypeus white, with a chestnut- 
colored spot passing outward from each of the middle eyes down 
to the margin. The third leg is longer than the fourth by little 
more than the tarsus. From Georgia. 
P. placidiis. 
The abdomen is dark brown, with a median longitudinal light 
band which reaches neither base nor apex. The third leg is longer 
than the fourth by the tarsus and metatarsus. The first leg is 
longer than the second by only the tarsus. From Mexico. 
P. cognatus. 
There are three longitudinal white bands on the cephalic part. 
The abdomen is fawn-colored with a light encircling band, and 
