50 NEW YORK STATE MUSEUM 
Simon considered D. tenebrosus Hentz a synonym of 
Dolomedes rufus but figured (Hist. Natur. des Araignées, 
2d ed., 1898, 2:302, fig. 309a) apparently following Emerton, the 
tibial apophysis of Dolomedes vittatus. 
Habits. This may be considered one of the rarer species in the 
north, particularly when the females are considered; at least they 
are not common in collections or abundant in the field. Abbot’s speci- 
MEM Wash enn aca keh nOt iy pill onimthemUOd\vMmOlmamthe cnn 
Ogechee river swamp, very rare.’ Hentz’s remarks, which apply to 
the male follow: ‘This spider is always found near or on water, 
running on it with surprising agility, preying on large aquatic in- 
sects. . . . This spider can dive and stay a considerable time 
under water, to avoid its enemies. It was found in March in Ala- 
bama under stones near a stream of water.” Emerton’s mature male 
was taken at Beverly, Mass., July 1, 1877, on or under stones near 
a brook; an immature male in the Fox collection at Cornell Uni- 
versity was taken at Glenhaven, TVenn., in June or July ; other males 
from Massachusetts and New York were immature in September and 
October. Females mature as early as the first week in June, per- 
haps earlier; one taken at Bee Spring, Ky., June 8, 1874, is the type 
of the figures here given, of the adult and epigynum. The males 
mature earlier in the season; one taken April 18th moulted May 11th 
(when it became mature) and died May 24th. 
Distribution. Hentz lists the species, of which he apparently 
had only males, from Massachuetts, North Carolina, South Carolina 
and Alabama. Banks had a male from Long Island; others 
from * Purgatory swamp, Milton, * Beverly, * Dighton, Mass. ; 
* Hollis, N. H.; * Green lake, Onondaga county, * New Rochelle, 
* Rensselaer, * Nassau lake, Rensselaer county, New York; * Falls 
Church, * Plummer’s island, * Black pond, Va.; * Cabin John, 
* Cedargrove, Md.; * District of Columbia; * Olney, Ill. ; * Raleigh, 
N.C. I have recently (June, 1923) found the females to be fairly 
common in a tamarack swamp near Voorheesville, N. Y. 
Dolomedes triton triton Walckenaer 
Hist. Nat. Ins. Apt., 1837, 1:340 
Type: Lycosa triton Walckenaer; type specimen not known to exist 
Type locality: Georgia 
Female (alcohol): length, average, 19.5mm; legs 4-I-2-3, 209-26-26-25mm; 
pl. 27; pl. 30, fig. 2-3 
Cephalothorax above greenish gray to reddish brown, clothed with 
short, dark brown hairs; a broad, submarginal, light stripe in the 
integument clothed with short, white hairs; extreme lateral margins 
