Peckham—Revision of the Attidce of North America. 393 
black, and is clothed with white hairs. The female palpus is 
yellow with white hairs. 
We have had this species from California, which furnished 
the type to Mr. McCook, and also from Boulder, Colorado, and 
Las Cruces, New 1 Mexico. Mr. Banks, who has it from Las Cru¬ 
ces and Los Angeles, was the first to point out that our griseus 
was a synonym of opifex. 
PHXDIPPUS CARDINALIS H. 1844. 
Plate XXIX, figs. 5—5b. 
1844. A. Cardinalis H. <$, Jour. Bost. Soc. Nat. Hist., IV, p. 386. 
1875. A. Cardinalis H. J 1 , Occ. Pap. Bost. Soc. Nat. Hist., II, p. 51. 
1883. Atttjs cardinalis P., g only, New or little known Attidsc, p. 31. 
1888. Phidippus cardinalis P., Wis. Acad. Sciences, Arts and Let¬ 
ters, VII, N. A. Att., p. 15. 
1901. Phidippus cardinalis P. Wis. Acad. Sciences, Arts and Let¬ 
ters, XIII, p. 285. 
In 1883 we described, as belonging to cardinalis, some fe¬ 
males from Wisconsin, which were really Whitmanii. The fe¬ 
male of cardinalis is now described for the first time. 
Length, $ 8-11 mm., 9 9 mm. Legs, 8 1423, $ 4132, first 
pair enlarged and fringed in male. 
In both sexes the color above is brilliant red, which, in the 
male, is uniform, and extends more or less on to the black sides, 
occasional specimens showing, when under alcohol, two dark 
longitudinal lines barred with red, on the posterior half of the 
abdomen. When unrubbed both sexes have the sides of the 
cephalothorax, as well as the upper surface, covered with red 
hairs. In the female the abdomen may be uniform red, like 
the male, or 'may have two dark lines barred with red on the 
posterior half. The sides are black with two nearly longitu¬ 
dinal white streaks, one behind and a little below the other. 
The legs, in the male, are usually black, lightened to brown 
at the proximal ends of the metatarsus and tarsus, but some ex¬ 
amples have the proximal ends of all the joints light. The 
