334 A New Jumping Spider. [ZOE 
ment. The side color is due to the same scales and the black line 
along the rim is due to the absence of them. The yellowish clypeus 
is caused partly by long hairs and partly by scales. In the male the 
coloring of the clypeus is not so clearly yellow because the hairs and 
scales are sparser. In the upper cephalothorax these yellowish 
scales are interspersed with other scale-hairs of like shape but of 
a grayish color and most brilliant iridescence, which are particularly 
numerous on the forepart and produce the bronzeluster. In some, 
especially in young specimens, these scale-hairs are thick all over. 
The skin color of the upper abdomen is deep brown or black, usu- 
ally appearing brown to the eye but under the microscope black 
with long black hairs. The yellow markings are formed of hairs 
like those on the cephalothorax, while the longitudinal dark bands 
are simply parts of the dark integument set in relief by the yellow 
scale-hairs. The yellow along outside of bands is in natural females 
a close collection of these scales, but in gravid females it appears as 
a series of oblique, backward streaks, one from each of the dots on 
the bands. This indicates weak portions of the integument, which 
stretch to make room for the eggs. Bronze hairs also, like those on 
the cephalothorax, are thickly set between the bands posteriorly, out- 
side the bands anteriorly, and on the forepart of the abdomen. 
‘Others are scattered among the yellow hairs. The yellow border in 
both sexes is composed in part of longer hairs than those forming the 
other markings. The dark upper abdomen of the male is due to the 
absence of yellow scale-hairs, although there are enough bronze 
scale-hairs to give it a luster. The under abdomen has the same 
black skin covered with nearly white scale-hairs of a smaller size than 
the yellow ones, They are not so thickly set along the middle and 
‘ the skin shows through, forming the darker central band. Male legs’ 
dark brown with darker brown rings, as follows: Last half of femur 
dark brown with tip end lighter; last end of tibia gradually darker; 
light scale-hairs on all except first two joints. The second pair of 
legs have dark rings on patella, tibia and tarsus; metatarsus with a 
black tip; scales as in first pair; third and fourth pair same. ‘Palpi 
light brown, last joint dark, dark hairs on last joints, light hairs on 
others; light yellow scales on femur and two succeeding joints; 
mouth-parts, coxa: and sternum dark brown; anterior coxee darker 
than posterior; falces nearly black; fang red-brown. 
