9 
10 
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16 
17 
18 
Wisconsin Academy of Sciences, Arts and Letters. 
Palpus all black; outer corner of maxilla with hooked 
apophysis. ardens (in part) 
Palpus white above; outer corner of maxilla with short 
point . californicus 
First leg longer than second by only tarsus and meta¬ 
tarsus; fringe on first leg not very heavy . clarus 
First leg longer than second by tarsus, metatarsus and 
part of tibia; fringe on first leg heavy and conspicuous 
coloradensis 
Palpus with white hairs above. 12 
Palpus without white hairs above . 13 
Distal end of femur of first leg with bunch of white 
hairs below . insolens (in part) and brunneus 
(If found in the north the spider is, almost certainly, 
brunneus, if in the south, insolens. These two species 
may be distinguished from each other by the palpi). 
No distinct bunch of white hairs below femur of first 
leg . Johnsonii 
Cephalothorax with brownish hairs over a black ground; 
abdomen with scattered white hairs, especially be¬ 
hind; no white hairs above femur of first leg. 
. ardens (in part) 
Cephalothorax with black hairs over a black ground; ab¬ 
domen with scattered black hairs; femur of first leg 
with white hairs above . formosus 
Abdomen red marked with black and white; first leg 
fringed with white . insignarius 
Abdomen red marked with white only; first leg fringed 
with black and white . Tyrrellii 
Cephalothorax with white band over front eyes and white 
side bands beginning at lateral eyes of first row; 
palpus with white band on femur only; falces dark, 
with streaks of white hairs; femur of first leg with 
iridescent plate beneath . femoratus 
Cephalothorax with no white band over front eyes and 
with white side bands running back from dorsal eyes; 
palpus with white band throughout length; falces 
bare, blue; no plate under femur of first leg. coccineus 
Cephalothorax dark with a white spot between dorsal 
eyes, a white bar on each side of head between eyes 
of second and third rows, and ridges of rusty hairs on 
cephalic plate. Femur of first leg with crest of hairs 
above and enlarged plate below . Putnamii (in part) 
Whole body black, upper surface of cephalothorax and ab¬ 
domen covered with silvery hairs . opifex 
Cephalothorax black sometimes banded with white; ab¬ 
domen black with tripunctate white markings ... 17 
Cephalothorax banded with white . 18 
Cephalothorax all black . audax 
Cephalothorax with wide white bands beginning at dorsal 
eyes and covering posterior sides ... variegatus 
Cephalothorax with transverse scalloped white band be¬ 
hind dorsal eyes, on thorax ... Howard!! 
