A REVISION OF THE PISAURIDAE OF THE UNITED STATES 55 
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vegetation (pl. 31). A film of air entangled in the hairy coat serves 
as a reservoir and disguise, and permits submersion for one-half 
an hour or longer. In the north immature males and females spend 
the winter hibernating in rubbish along the shores of ponds or 
streams or in the heaped up debris of muskrat houses. In May 
or early June the males mature and may be found in numbers, pur- 
suing over the water a solitary female who may not yet be ready 
to receive their advances; a little later, however, mating takes place 
and shortly the egg sac appears and is carried about until the young 
are ready to emerge. I have not collected the nursery web of this 
species but McCook* gives figures of two which are of the usual 
form. 
Dolomedes triton resembles in habits and markings the 
Dolomedes fimbriatus of Europe which is said to con- 
struct a raft of floating leaves used as a resting and watching place 
for passing insects. | 
Distribution. Newfoundland; * Winnipeg, Lake of the Woods, 
Ottawa, Aweme, Manitoba, Canada; * Hollis, Franconia, N. H.; 
Wellesley, Dorchester, Swampscott, Amherst, Reading, Dedham, 
Ipswich, Riverside, Wood’s Hole, Mass.; New Haven, Conn.; 
* Brittons, * Long Branch, Onondaga county, * Ithaca, * McLean, 
* Kenwood, * Albany, * Baldwin, * Grasmere Station, S. I., * Clyde, 
* Sodus Bay, N. Y.; * Trenton, * Lakehurst, Point Pleasant, N. J.; 
Philadelphia, Pa.; * Malta, * Columbus, Sandusky, Ohio; * Green- 
castle, * Buffington, Hammond, Lake Tippecanoe, Ind.; Libertyville, 
Glencoe ravine, Ill.; Agricultural College, Miss.; Douglas lake, 
Mich.; St George, Kan.; * Washington, Rock creek, Potomac river, 
District: of Columbia; * Baltimore, Hyattsville, Md.; Great Falls, 
Va.; * Raleigh, Swannonoa Valley, N. C.; * Minnie Lake run, 
* Billy’s island, * Billy’s lake, * Mixon’s Hammock, * Honey island 
Prairie Okefinokee swamp, *Fargo, Ga.; *Columbia, Spring- 
field, Mo.; * Baton Rouge, New Orleans, La.; Auburn, Gallant, 
Magnolia Springs, Ala.; * Beersheba, Tenn.; Lake Worth, Fla.; 
Austin, Texas. 
Dolomedes triton triton seems to be confined to the 
south. I have examined specimens from Billy’s island, Billy’s lake 
and Minnie lake, Okefinokee swamp, Ga. 
Several immature specimens from Olympia, Wash., in the col- 
lection of the Museum of Comparative Zoology, are indistinguishable 
from D. triton sexpunctatus, but it is likely that mature 
individuals would exhibit characters at least of subspecific value. 
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