40 



(Rlpuaria.^ 



6. Dolomedes urinator. 

 ' PI. 6, fig. 3. 



Descrijytion. Livid brown, somewhat liairy; cephalothorax 

 with obscure marks uniting towards the centre, two approxi- 

 mate wedge-like black spots on the disc ; a black spot behind 

 the external posterior eyes ; abdomen varied with curved black- 

 ish lines, and with eight, ten, or twelve white dots surrounded 

 with black ; feet with brownish rings. 



Observations. This large spider is found near water, on 

 which it runs with great swiftness. When closely pursued, it 

 dives under the surface, and conceals itself under some leaves 

 or rubbish till danger is past. It is to this species, probably, 

 though possibly to D. lanceolatus, that must be referred a sketch 

 sent me by Dr. T. W. Harris, Avith the description of the web 

 made by the female. I have not yet been fortunate enough to 

 find the web of either species. I have found a specimen of 

 this, on the 3d of March, in Alabama, basking in the sunshine 

 on the south side of a tree, on the margin of the Cypress creek. 

 I took it for Micrommata caroUnensis, notwithstanding its large 

 size, but its markings corresponded [191] entirely with this; 

 only its general color was bordering on testaceous or pale brown. 



Habitat. North Carolina, Alabama. 



[New Lexington, O., ?. Wm. Hoklen. The sketch here mentioned is 

 published in Harris' Correspondence, p. 4, and a description of the nest on 

 p. 37. It was found in Milton, Mass., August, 1824. .t. h. e.] 



7. Dolomedes lanceolatus. 



PI. 7, fig. 12. 



Description. Brownish ; cephalothorax W'ith two approxi- 

 mated triangular black spots, and a yellowish band round the 

 disc which does not extend to the margin, and is interrupted at 

 base ; abdomen with a yellowish band, which has on eacH side 

 two branches directed towards the disc ; feet varied with pale 

 rings. 



Observations. This spider is always found near, or on w^ater, 

 running on it with surprising agility, preying often on large 



