54 
Dolomedes sexpunctatus, 
ZOD eat Seow OOD 
Dolomedes sexpunctatus, 
D. 53 
NEW YORK STATE MUSEUM 
Emerton, Trans. Conn. Acad., 1909, 14: 
Banks, U. S. Nat. Mus. Bul. 72, 1910, 
Dolomedes triton, Petrunkevitch, Ann. Acad. Sci., 1910, 19:219-220 
Dolomedes triton, Petrunkevitch, Bul. Amer. Mus. Nat. Hist., 1911, 
29 :542 
Dolomedes sexpunctatus, 
1QII, 53 :452 
Dolomedes sexpunctatus, 
p. 614-616, figs. 704-706 
Dolomedes sexpunctatus, 
Dolomedes sexpunctatus, 
1916, 68:82 
Dolomedes sexpunctatus, 
brates, 1916, p. 432 
Dolomedes sexpunctatus, 
Dolomedes sexpunctatus, 
Bealies, Jesxorej Avenal, INet, Sei 1B oulle,,, 
Comstock, The Spider Book, 1912, 
Emerton, Ent. News, 1914, 25:118 
Banks jb rocwyANcadyuNatsinsctumentlan 
Pratt, Manual of Common _ Inverte- 
Barrows, Ohio Jour. Sci., 1918, 18:313 
Emerton, Ent. News, 1919, 30:168 
Dolomedes sexpunctatus, Emerton, Trans. Royal Can. Inst., 1910, 
125327, 
Dolomedes sexpunctatus, 
459, 472 ; 
Dolomedes, sexpunicta tus.) Kraatz) Ohio! Jour )Sei.) 1o2T mene. 
Krecker, Ohio Jour. Sci., 1919, 19:440, 
Remarks. Comstock?! described two forms of the male, which 
he characterized as follows: “Type a—=In this form the width of 
the clypeus is about equal to the space between the anterior median 
eyes and the posterior median eyes; the posterior median are but 
little if at all larger than the anterior median eyes; the anterior row 
of eyes is longer than in Type 0; and the femur of the fourth pair 
of legs lacks the spinose hump characteristic of Type b. 
“Type b: This type of male is easily recognized by the presence 
of a spinose hump under the femur of the fourth legs. The width 
of the clypeus is two or three times as great as the space between the 
anterior median eyes and the posterior median eyes; the posterior 
median eyes are much larger than the anterior median eyes; and | 
the anterior row of eyes is but little longer than the row formed 
by the posterior median eyes.” 
I have been unable to find a mature male of D. triton with 
the characters of Comstock’s type a although material from many 
collections, including the Cornell University series, has been care- 
fully examined. The spinose hump on the lower side of the femur 
of the fourth legs reaches full development as a secondary sexual 
character with the moult that frees the palpal organs, although it 
may be indicated some time before by a few stiff hairs. 
Habits. Of all our species of Dolomedes this is perhaps the most 
truly aquatic. It is found in swamps, on marshes and ponds or the 
still reaches of sluggish streams, running on the surface or diving 
below to hide on the under surface of leaves or stems of aquatic 
1The Spider Book, p. 614. 
