436 Wisconsin Academy of Sciences, Arts and Letters. 
band, and back of this there is a darker region upon which are 
three white spots in a transverse row, the middle one sometimes 
merging into the gray of the ground color. The sides are gray 
below, but have wide white bands just under the eyes, and con¬ 
tinuing on to the thoracic part. There are strong black tufts 
in front of the dorsal eyes, and slighter ones on the sides of the 
head, below the lateral eyes. The abdomen has a white band in 
front, and diagonals on the sides. Above, near the front end, 
is a pair of white spots, and farther back, at about the middle 
point, is a larger pair, sometimes coalesced. From above, the 
posterior part of the abdomen seems to be marked with two 
pairs of white bars, but these are usually joined at their lower 
ends, and sometimes form the peculiar figure that is seen in 
otiosus, while in fresh specimens the marks are more like those 
of 'obscurus. These three females are easily distinguished, 
since obscurus has a uniform white cephalothorax, and otiosus, 
a much heavier and hairier spider, has the surface of the ab¬ 
domen, under the hairs, brightly metallic. The clypeus is 
covered with short white hairs. The upper parts of the falces 
are dark with not very long white hairs, and the lower parts 
are metallic green. The palpi are light brown with white hairs, 
and the legs, more or less banded with light and dark brown, 
have light fringes of soft white hairs, intermixed with dark at 
the distal end of the tibia of the first. 
Purpuratus is a larger, heavier spider than mystaceus, with 
a uniform cephalothorax and metallic scales on the abdomen. 
Our specimens are all from Austin, Texas. Hentz had it 
from North Carolina. Mr. Emerton’s remarks under mysta¬ 
ceus, in Occ. Pap. Bost. Nat. Hist. Soc. II, refer to the female 
of purpuratus. 
