Peckham—Revision of the Attidce of North America. 405 
of the metatarsus and tarsus, -and thick black hairs under the 
other parts. The palpus is black with a white band on the fe¬ 
mur, above. The bulb is sometimes shrunken, giving it the ap¬ 
pearance of being truncated, and in one example the upper stri¬ 
ated part is shortened and not notched. 
The female has the cephalothorax black, covered with brown¬ 
ish hairs. The abdomen, as in ardens, is red, with a central 
longitudinal black band which does not reach the base, but it 
differs from that species in having a triangular white spot on 
the band, in front of the middle, and a pair of oblique white 
bars nearer the base, the posterior part of the band being 
notched with white or red on the edges. In some specimens 
there is a line of thinly-set light hairs down the middle of the 
black band. There is a white basal band, and on the sides are 
white diagonals. The legs are usually banded and are rather 
hairy. 
From this normal female there are wide deviations in the 
relative proportions of red and black on the abdomen, and in 
the depth of color. The red is sometimes reduced to an irregu¬ 
lar patch or short band on each posterior side, and we have taken 
specimens (at Sisson, Cal.), in which the abdomen was black 
except that toward the end of the dorsum there were two elon¬ 
gated yellow spots, deeply notched with white on their inner 
edges, the central white spot not being present. 
Another female, from Victoria, has a black abdomen with a 
white basal band, and spots and diagonals which are red in the 
upper and white in the lower half (see figure). This might, 
perhaps, be called a distinct species. All these varieties keep 
the white basal band and at least one diagonal on each side. 
The palpi are yellowish. 
The colors are brightest just before maturity. Females taken 
at this time have a metallic band running forward from the spin¬ 
nerets for one-third the length of the abdomen. This band is 
bounded in front by a pair of very small oblique red spots 
which are parallel with the larger pair further forward which 
usually coalesce to form the central triangle. 
The types of this species and of P. bicolor have been carefully 
compared and are identical. 
