386 Wisconsin Academy of Sciences, Arts and Letters. 
8 -i 
Abdomen with light basal band . 7 
Abdomen without light basal band. A southern and west¬ 
ern species . cardinalis (in part) 
Abdomen with indistinct light basal band; black bands 
on abdomen going only halfway forward. New Eng¬ 
land, Pennsylvania, Missouri . McCookii (in part) 
Abdomen with distinct white basal band; black bands on 
abdomen going nearly to base. From all parts of 
United States . clarus 
Sides of cephalothorax black; abdominal black band reach¬ 
ing just in front of middle, without central white 
spot. Middle and southern states . insolens (in part) 
Sides of cephalothorax covered with white hairs; ab¬ 
dominal black band reaching to near the base, and hav¬ 
ing a central white spot . coccineus 
Abdomen all red . 10 
Abdomen red with white spots. California, New Mexico 
. femoratus 
Cephalic plate all red ..... 11 
Cephalic plate with bare black region back of first row of 
eyes. New England, Virginia, Wisconsin .Whitman!! 
j Abdomen with light basal band . 12 
I No basal band on abdomen. cardinalis (in part) 
( Sides of cephalothorax covered with yellowish-red hairs 
12 ] .. McCookii (in part) 
( Sides of cephalothorax black . insolens (in part) 
Both McCookii and insolens sometimes turn yellow if kept 
for a time in alcohol. 
13 
Cephalothorax black with black hairs. Iowa, Kansas, Cali¬ 
fornia . formosus 
Cephalothorax dark, covered with inconspicuous brown or 
gray hairs . 14 
14 
Abdomen red, with black band notched on edges with white 
or red . 15 
Abdomen red, with black band marked by central white 
spot in front; or abdomen black, spotted with white, 
and having an irregular red patch on each side; or 
abdomen black with bands and spots which are white 
in the upper and red in the lower part.. Johnsonii (in part) 
-|k f Fourth leg about as long as whole body . coloradensis 
\ Fourth leg only 3-4 as long as body. ardens 
f Abdomen with central black band; no square light spot on 
I cephalothorax . 17 
16 Abdomen with central white band; cephalothorax with 
! square light spot between dorsal eyes. New Mexico 
l ... comatus (in part) 
