Peckham—Revision of the Attidce of North America. 579 
ZYGOBALLUS BETTINI P. 1888. 
Plate L, figs. 7—7e. Plate LI, fig. 10. 
1888. Z. Bettini P., g $, Wis. Acad. Sciences, Arts and Letters, VII, 
N. A. Att., p. 89. 
1891. Z. Bettini Em. % Tran. Conn. Acad., VIII, New England At- 
tidse, p. 12. 
Length, S 3-6 mm., $ 4 mm. Legs, $ 1423, $ 4123, 
femur I enlarged. Spines, $ tib. I 3-3, met. I 2-2, tib. II 1 
pair and 2 serially below, with 1 anterior lateral, met. II 
2-2. $ like $. Some males have 1 patellary spine. The 
spines under the tib. I are not in regular pairs. In large speci¬ 
mens the legs are relatively longer, and the irregularity of the 
spines is emphasized. 
In the male the whole body is bronze-brown, with red and 
green reflections on the eye-region. The falces, the clypeus, 
and the sides of the oephalothorax beyond the second row of 
eyes, are covered thickly with white scales. The abdomen has 
a basal band and two curved transverse bands, interrupted in 
the middle, all iridescent white. The color of the abdomen is 
darkened on the edges of the transverse bands. The first leg is 
usually reddish-brown, sometimes with a white stripe on patella, 
tibia and part of metatarsus, but in other examples the femur 
only is red, the other joints being yellowish-white, with or with¬ 
out a dark longitudinal line on the inner side. The other legs 
are light yellow, sometimes marked with black lines. The pal¬ 
pus is brown. The males do not develop their peculiar falces 
until maturity. 
In the female the ground color is bronze, similar to that of 
the male. The white ornamental scales on the front are lacking. 
The abdomen has a white basal band, and on the front part of 
the dorsum are two short longitudinal, angular, white bands, 
with bronze scales between. Behind this are several whitish 
chevrons, which grow smaller as they approach the spinnerets. 
Alternating with these are dark spots, and the sides are indis¬ 
tinctly barred with white. In some examples the chevrons are 
39—S. & A. 
