Peckham—Spiders of the Family Attidae. 187 
Copocrossa bimaculata sp. nov. 
Plate XIX, figs. 7, 7 a. 
Tlie abdomen is yellowish with a round black spot, on each 
side, behind the middle. 
$, (not quite mature). Length 4.5 mm. Legs 1423, first 
pair much the stoutest, second next. 
Both cephalothorax and abdomen are low and flattened. 
The cephalic and thoracic parts form a flat plate which nar¬ 
rows to a blunt point at the posterior end, and from this the 
sides slant outward, the fall in the eye-region being not far 
from vertical. There is a slight widening out of the cephalo¬ 
thorax behind the dorsal eyes. The quadrangle of the eyes 
is one-fifth wider than long, is wider behind than in front, and 
occupies a little more than one-third of the cephalothorax. The 
anterior eyes are close together in a row that is very slightly 
bent downward, the middle eyes being more than twice as large 
as the lateral. The second row is plainly nearer the first than 
the third, and the third is nearly as wide as the cephalothorax 
at that place. The cephalothorax is about twice as long as 
wide. The clypeus is very narrow, and the falces are short 
and weak. The sternum is long and narrow. The labium is 
as wide as long and the coxae of the first pair of legs are sepa¬ 
rated by less than its width. The first leg has the femur and 
tibia much enlarged. The spines are rather long and stout. 
The tibia has two above and three below, those underneath 
having stiff black hairs between the rows, and the metatarsus 
has two pairs. The second leg has lighter spines, two, one 
behind the other, on the tibia, and one pair and one single spine 
on the metatarsus; the third and fourth are almost unarmed. 
The spinnerets are underneath the abdomen, the posterior end 
of which projects over them in an obtuse point, very much as. in 
Simon’s drawing of Copocrossa tenmlineata (Hist. Hat. des 
Araignees, p. 474). 
Our specimen has been rubbed bare, the only hairs remain¬ 
ing being some whitish ones along the line of the eyes. The 
cephalothorax is yellowish-brown above and a shade darker on 
the sides, and seems to have had two black spots above on a line 
