396 Wisconsin Academy of Sciences, Arts and Letters. 
FHIDIPPUS McCOOKII P. 1883. 
Plate XXIX, figs. 4—4c. 
1883. Attus mccookii P. $, New or little known Attidse, p. 16. 
1885. Phidippus ruber K. $, Yer. z. b., Gesell. VI, p. 493. 
1888. Phidippus mccookii P. $, Wis. Acad. Sciences, Arts and Letters, 
VII, N. A. Attidse, p. 17. 
1891. Phidippus ruber E. $, Trans. Conn. Acad., VIII, New England 
Attidse, p. 8. 
1892. Phidippus mccookii B. Proc. Acad. Nat. Sci. Phila., Jan. 26, 
p. 73 (?) 
1901. Phidippus mccookii P. $, Wis. Acad. Sciences, Arts and Letters, 
XIII, p. 288. 
1901. Phidippus ruber P. ibid., p. 285. 
In the type specimen of McCookii the red hairs on the ab¬ 
domen had changed to bright yellow, and we did not suspect 
its identity with ruber until recently, when Mr. Henshaw sent us 
Keyserling’s female. In 1888 we thought that this species, which 
we called ruber was a synonym of rufus H., but there is no 
doubt that they are distinct. We think, as Mr. Banks has sug¬ 
gested, that McCookii is the northern representative of cardin- 
alis H. 
Length, S 6-7 mm.; 2 11-15 mm. Legs, $ 1423, $ 4132. 
This spider resembles clarus. The cephalothorax, in both 
sexes, is covered with orange scales and is light brown beneath. 
The abdomen in both is light orange above and light to darker 
below. On the posterior half of the abdomen in the male, are 
two distinct longitudinal black stripes on which are two pairs 
of white spots. In the female these black stripes are more in¬ 
distinct. The base of the abdomen, in both sexes, has a lighter 
basal band. The femora of all the legs and the tibia in 
the first pair, especially in the male, are darker than the 
other joints. The other parts reddish brown, sometimes darker 
toward the distal end. The falces are brown, and not iridescent 
in the specimens seen both by Mr. Emerton and ourselves. In 
Count Keyserling’s they were iridescent. Ho white stripe on 
palpus of male, which is dark. The fringes of hairs on the 
