Peckham—Revision of the Attidce of North America. 381 
1895. Phidippus B., Can. Ent., p. 96. 
1896. Phidippus P., Occ. Pap. Nat. Hist. Soc. W. S., Ill, 1, p. 34. 
1896. Phihuus B., Trans. Am. Ent. Soc. XXIII, p. 73. 
1898. Phidippus B., Ent. News, June 1898, p. 142. 
1899. Phiheus B., Proc. Ent. Soc. Wash., IV, 3, p. 190. 
1901. Phidippus P., Wis. Acad. Sciences Arts and Letters, XIII, pp. 
288-298. 
1901. Pabn^enus P., ibid., p. 301 (griseus). 
1901. Phidippus P., ibid., pp. 280-287. 
1904. Phidippus B. Jour. N. Y. Ent. Soc., XII, 2, p. 115. 
1905. Phidippus Sch., Industrialist, Vol. 31, 28, p. 6. 
1906. Phidippus B. Proc. Ent. Soc. Wash., VII, 2-3, p. 98. 
Spiders above medium size, sometimes very large and hairy. 
The cephalothorax is high and massive, wide and rather short. 
As a rule the sides round out widely both from above below 
and from in front to the middle point. The widening from 
above below is usually more pronounced in the males than in 
the females. The cephalic plate slants forward. The thoracic 
plate is short and wide. The thorax falls from the dorsal eyes, 
at first gradually and then more steeply. 
The quadrangle of the eyes is one-third wider than long, ex¬ 
cepting in a few species, as arizonensis, which is one-half, and 
opifex, which is two-thirds wider than long. It occupies about 
two-fifths of the cephalothorax and is plainly wider behind than 
in front. The eyes are small in proportion to the size of the 
spiders. The first row is curved, the middle being less than 
twice as large as the lateral and a little separated from each 
other, while the lateral are separated from them by from one- 
third to two-thirds of their own diameter. The second row is 
about twice as far from the third as from the first row. The 
dorsal eves are as large as the lateral and form a row which is 
plainly narrower than the cephalothorax at that place. 
The patterns on the abdomen in Phidippus are all modifi¬ 
cations of a normal type,—light basal and side bands and four 
pairs of white spots above, on two dark longitudinal stripes. 
These marks may be partly or wholly obliterated. The relative 
size of the spots is variable, and those of the second pair are 
often joined to form a central triangle, while the posterior pairs 
