56 NEW YORK STATE MUSEUM 
Dolomedes albiclavius noy. sp. 
Type: A mature female in the collection of the Museum of Comparative 
Zoology, Cambridge, Mass., Nathan Banks, collector 
Type locality: Springfield, Mo. 
Female (alcohol): length 22mm; legs 4-I-2-3; 47-40-39-38mm; pl. 32; 
pl. 33, fig. 4 
Cephalothorax above deep reddish brown; behind the posterior 
eyes an oval area of lighter brown through the center of which a 
longitudinal, light line extends to the dorsal groove; sides of the 
cephalothorax each with a broad submarginal band of short, white 
hairs extending from the lateral margins of the clypeus to the pos- 
terior margin of the thorax and coincident with a light stripe in 
the integument. yes each surrounded with a narrow, black ring; 
spaces between with short, white, and scattered, long and stiff, brown 
hairs ; anterior row slightly recurved; the median, separated by less 
than the diameter of one of them, are a little larger than the lateral 
and closer to them than to each other; posterior row strongly re- 
curved, eyes subequal in size; the median slightly less than their 
diameter apart, one and one-fourth times their diameter from the 
lateral. Clypeus brown with indistinct patches of short, white hairs. 
Chelicera deep brown to black clothed with long, yellowish pubes- 
cence. Abdomen above uniform dark brown clothed densely with 
short, brown hairs; upper half of sides of abdomen with a broad 
band of dirty white hairs not very distinct in alcohol; lower half 
and venter brownish and covered densely with dull yellow pubescence. 
Legs above deep brown, indistinctly mottled on the femora and 
clothed with short, brown hairs; below lighter with mixed yellow and 
brown hairs; metatarsi and tarsi scopulate beneath. Sternum red- 
dish brown, darker on the margins, produced to a point behind and 
with the sides broadly notched at the bases of the coxae. Labium 
and endites deep brown to black, lighter distally. Epigynum: lateral 
lobes widely separated behind as in D. triton, the median lobe, 
from the posterior margin, extends forward three-fourths the length 
of the epigynum (pl. 33, fig. 4). 
The male is not known. | 
Remarks. This large and distinct species is evidently related to 
Dolomedes triton but differs from it in the structure of the 
epigynum, in its general darker color and lack of paired white spots 
on the dorsum of the abdomen. The legs are proportionally and 
actually longer in this species than in D. triton and the body 
more robust. 
Distribution. *Sprinefield, Mo., *Salt Lake, Utah; *Billy’s island, 
Okefinokee swamp, Ga. 
