A REVISION OF THE PISAURIDAE OF THE UNITED STATES 37, 
lighter, tapering from epigastric furrow to spinnerets. Legs red- 
dish brown, indistinctly blotched on femora; terminal segments 
darker. Sternum uniform dark brown, thickly haired. Labiwm and 
endites bright reddish brown, lighter distally. Epigynum consid- 
erably broader than long; median lobe concave anteriorly, convex 
on posterior half ; lateral lobes barely separated behind (pl. 33, fig. 3). 
Male unknown. 
Synonymy 
Dolomedes urinator Hentz, Bost. Jour. Nat. Hist., 1845, 5:190, 
play TON es 3 
Dolomedes urinator Hentz, Reprint, Occ. Papers Bost. Soc. Nat. 
Hist., 2, 1875, p. 40, pl. 6, fig. 3 
Dolomedes urinator, Marx, Proc. U. S. Nat. Mus., 1890, 12:566 
Dolomedes urinator, Banks, Proc. Acad. Nat. Sci. Phila., 1802, 
44°73 
Drolomierdesiauip maton Banks) Proc Acad: Naty) Se) Bhilay \ro0o} 
52 :536 
Dolomedes urinator, Montgomery, Proc. Acad. Nat. Sci. Phila., 
1902, 54:586-588, pl. 30, fig. 50. In part, described D. scriptus but figured 
epigynum of D. urinator 
Dolomedes urinator, Montgomery, Proc. Acad. Nat. Sci. Phila., 
1904, 50:317—-319 (females, in part) 
Dolomedes trrinator, Banks, Bul. 72, U. S. Nat. Mus., 1910, p. 53 
Dolomedes urinator, Petrunkevitch, Bul. Amer. Mus. Nat. Hist., 
1QII, 29:542 (in part) 
Dolomedes ur:nator, Comstock, The Spider Book, N. Y., 1912, pp. 
609, 611-612 (in part), figs. 699-700 
Dolomedes urisnator, Barrows, Ohio Jour. Sci., 1918. 18:313 
Remarks. Dolomedes urinator has been very generally 
regarded as the female of the species described by Hentz* under 
the name Dolomedes lanceolatus. This relationship, 
first suggested by Banks, was accepted by students of spiders as a 
natural one, since males in one case were unknown and females 
having the markings of D. lanceolatus had never been re- 
corded. Now, however, the females of D. lanceolatus are 
known to resemble the males and the specific name of Walckenaer, 
Dolomedes vittatus, 1s applicable. 
The list of references given above includes only those accounts 
which mention or describe the female. The male of D. urinator 
is unknown to me and I can find no description of it or record ot 
its capture. It is, perhaps, like the male of Dolomedes tene- 
brostus, very much smaller than the female and earlier maturing ; 
the females, however, are among the largest of our native species. 
Habits. Concerning the habits of this species Hentz remarks: 
“ This large species is found near water, on which it runs with great 
swiftness. When closely pursued, it dives under the surface, and 
1 Bost. Jour. Nat. Hist., 1845, 5 :190. 
