Supplement to the New England Spiders. 241 
length, 36 mm. The palpi are 9 mm. long with the tibia straight 
and with a forked process in the middle of the outer side. The 
tarsus and palpal organ have been correctly figured in N. E. Lycoside. 
This species seems to be common as far south as the mountains 
of North Carolina. On Lake Champlain, Vt, and Lake Winnipesaukee, 
N. H., it matures about July 1, when it is common along the shore 
under loose stones and the floats of boat landings. It runs on the 
surface of the water and on the bottom, carrying a large amount of air 
adhering to its hairs. It remains under only a short time, coming 
quickly to the shore as soon as it has escaped pursuit. 
‘Dolomedes idoneus, Montgomery. Proc. Phila. Acad. Nat. Sci., 
Nov. 1902. (Plate VII, figure 8.) 
The female of this species is of the same size as fonfanus and 
has similar markings, but the color in alcoho] is reddish brown in- 
stead of olive gray, which is usual in fontanus. The shape of the 
head is the same as in fontanus, and the arrangement of the eyes 
is the same, the only difference being in the size of the front middle 
eyes, which in this species are twice as large as the laterals of the 
same row. The shape of the epigynum is characteristic of this 
species, even when half grown. The middle lobe is round and 
swells out beyond the surface of the abdomen, and there is a distinct 
opening on each side between it and the lateral lobes. 
The male has not been described. 
Females have been found at Lake Champlain, Vt., and at Sims- 
bury and New Haven, Conn. 
Dolomedes urinator, Hentz. Montgomery, Proc. Acad. Nat. Sci, 
Philadelphia, 1904. 
The male spider described by me in 1885 as the male of D. 
lenebrosus appears to be urinator or lanceolatus, Hentz. I have not 
found females but have one from Pennsylvania sent me by Mr. 
Montgomery. 
An immature male from Milton, Mass., resembles closely the draw- 
ing of D. lanceolatus by Hentz. It has the tuft of stiff hairs on 
the femur of the fourth leg, like the mature males that I have de- 
scribed. 
Dolomedes vernalis, new. (Plate VII, figures 7 to 7d.) 
Males from Falmouth, Me., and Three Mile Island, Lake Winni- 
pesaukee, N. H. Cephalothorax 3 to 4mm. in length and a little 
less in width. Fourth and first legs 16 to 18mm. The colors are 
