38 



(Tenebrosce.) 



3. Dolomedes tenebrosus. 

 PI. 5, figs. 10, 13. 



Description. Livid brown ; abdomen and cephalothorax 

 varied with blackish angular markings ; feet annulated with 

 blackish ; frequently measuring over four inches from the ex- 

 tremity of the first pair of legs to that of the fourth pair ; male 

 with legs 1. 2. 4. 3. 



Observations. This spider, one of the largest of the whole 

 family, is very common in dark, retired places, hiding in cre- 

 vices during the day, and issuing at night from its retreat for 

 the purpose of seeking for prey. It does not seek the vicinity 

 of water near which it was never seen, but dwells generally in 

 elevated dry places. The female does not make a web, but 

 carries its cocoon, grasped with her cheliceres. The cocoon is 

 orbicular whitish, and of the size of a common cherry. I have 

 occasionally seen this Dolomedes in the daytime, but it seemed 

 always inactive, and easily captured. It can be readily dis- 

 tinguished from D. albincus, by its having no yellowish spot 

 under the abdomen, and by the white hairs on its legs. 



Habitat. Carolina, Alabama, Massachusetts ? 



[Ohio. ?, e. Wm. Ilolden. jr. n. E.] 



4. Dolomedes scriptus. 

 PI. 6, fig. 1. 



Description. Pale brownish ; cephalothorax varied with 

 black and white ; abdomen with a broad blackish band inter- 

 sected by waved white lines, and usually edged with whitish, 

 pale spotless underneath ; feet varied with obscure brown, ulti- 

 mate joint tipped with blackish. 



Observations. This species was found in great numbers on 

 the margin of a stream under stones. The two triangular 

 black spots, visible on the cephalothorax of D. urinator and 

 D. lanceolaius, are obsolete on this. Many were examined, 



