37 



(Arborece.) 



1. Dolomedes tenax. 



PI. 5, fig. 7." 



Description. Grayish ; ceplialothorax edged with black, 

 varied with blackish on the disk ; abdomen also edged with 

 black near the base, varied longitudinally, with blackish on the 

 disk, about three whitish dots on each side near the apex, pale 

 beneath, with two obscure longitudinal lines ; feet, with black- 

 ish bands above, pale beneath. 4. 2. 1. 3. Never large. 



Observations. This distinct species is always found on up- 

 right sticks, small trees, etc., turning round to avoid an attack 

 in the same manner as Oxyopes scalaris, which it resembles so 

 much that for a time I could not distinguish one from the other. 

 It spreads its feet like Thomisus. The form of its cephalotho- 

 rax is peculiar, the head being elevated and well-defined from 

 the thorax. It must not be taken for the young of I), tenebro- 

 sus, which resembles the old, and dwells in dark places, 

 whereas this is quite a diurnal species, fond of broad daylight. 



Habitat. North Carolina. 



2. Dolomedes hastulatus. 



PI. 4, fig. 9. 



Description. Pale or greenish gray ; cephalothorax varied 

 with blackish ; abdomen with a blackish band, with rounded 

 [396] edges near the base, and terminating with a hastate point 

 towards the apex ; feet varied with gray or blackish. 2. 4. 1. 3. 



Observations. This was found in September in a w^eb, like 

 that of Agelena. This can be readily distinguished from 

 D. tenax, particularly by the form of its cephalothorax, in 

 which the head is not elevated as in that species. The second 

 pair of legs being sensibly the longest. This species could 

 almost be referred to Micrommata. It was found in March 

 upon the stump of a tree not far from a stream. 



Habitat. Alabama. September. 



