24 
ATTIDvE OF THE UNITED STATES. 
1883 
The abdomen is bright yellowish scarlet. A. wide central longi- 
tudinal black band begins at the middle point, and extends backward 
to the spinnerets. Its anterior margin is marked by a short, curved, 
white band. On the edges of the black band are two pairs of white 
dots; the posterior two dots are close to the apex, and mark the pos- 
terior border of the red color. At the base of the abdomen is a wide 
white band, which extends on to the sides; and below this a black 
band passes around the sides, blending, at the apex, with the central 
black band. As the anterior ends'of the encircling band are not 
visible from above, the black marking at the posterior part of the ab- 
domen has the appearance of an anchor. 
'I'he venter is black, with white hairs, which form four indistinct 
lines, two at the edges, and one on either side of the center. The 
middle lines do not reach the apex. 
The epigynum is not uncovered. 
Habitat, Iowa. 
Observations. This species is from the Putnam collection. 
XIX. Attus aljso— immaculatus, new. 
(Plates II and III, Figures 19 to 19a.) 
FEMALE— Length, 0.1 min.; width of abdomen, 2 mm. ; length of ceph.th., 2 mm.; 
width of ceph.th., 1.6 mm. 
Legs. 
Fein. 
Pat. 
Tib. 
Metat. 
Tar. 
Total, 
1 . 
1.1 
.5 
.6 
.5 
.5 
3.2 
o 
.8 
.4 
.5 
.6 
.3 
2.6 
3. 
.9 
.4 
.4 
.4 
.3 
2.4 
4. 
1.2 
.7 
.7 
.9 
.4 
3.9 
The cephalothorax is low. The cephalic and thoracic parts are 
equal in length. The color of the cephalothorax is white, being denseh 
covered with short white hairs. 
'I'he quadrangle of the eyes is as long as wide, and wider behind. 
The dorsal eye is slightly larger than the lateral, and is placed lower 
on the caput, so that it straight line from the upper border of the 
dorsal cuts the lower border of the lateral eye. The small median is 
slightly higher than the lateral eye, and is nearer the lateral than the 
dorsal eye. The anterior row of eyes is slightly curved, a line from 
the top of the middle cutting the lateral eyes above the center. The 
middle are more than twice as large as the lateral eyes and are sub- 
touching. The lateral are separated from the middle eyes by about 
their own diameter, and are placed further back on the face. The 
flypeus is half as wide as the middle eyes, vertical, and covered with 
dense short white hairs. 
The palpus is covered with white hairs. 
The f aloes are relatively stout, vertical, and have the anterior 
surface slightly rounded. They are covered with white hairs. 
