CHAMBERLIN: THE ARACHNIDA. 259 
small pale median spot at base and vague paler markings over middle 
and caudal regions; venter with a vague pale line on each side and also 
paler in front of genital furrow. 
Cephalothorax broadly ovate; the head much narrowed, projecting 
conspicuously forward above and over the clypeus, highest midway 
between eyes and caudal end. 
Abdomen slender, narrowed caudad, at caudal end produced caudo- 
dorsad into a long, slender, cylindrical process, on each side at base 
of which is an acute spinous process or point, an acute process or point 
also occurring toward each anterolateral corner; lower, less distinct 
cornicles also occurring elsewhere over the dorsum, (Plate 20, fig. 2). 
Posterior row of eyes strongly recurved; median eyes a little more 
than their diameter apart, and between three and four times their 
diameter from the laterals. Lateral eyes on each side contiguous, 
borne upon a common low tubercle at a considerably more ventral 
level than the medians, the posterior one smaller than the anterior. 
Quadrangle of median eyes distinctly narrower caudad than cephalad 
(4:5), wider in front than long (about 25:22), the median eyes raised 
on a broad, common elevation. Anterior row of eyes straight or 
slightly recurved; median eyes larger than the posterior medians 
(diameters about as 9:7), not fully their diameter apart, two and a half 
times their diameter from the laterals; median eyes projecting con- 
spicuously forward over the receding clypeus. Median eyes about 
once and a third their diameter from edge of clypeus but seen in 
projection directly in front appearing only about one half their diame- 
ter removed from this edge, (Plate 20, fig. 1). 
Labium not distinctly separated from the sternum; much wider 
than long; distal portion triangular, its sides straight and meeting 
at an angle in the median line; proximal portion transversely de- 
pressed. Endites well bent, curving over the labium, the inner side 
conspicuously curved. 
Sternum longer than wide in nearly ratio 13:10 or 13:11; widest 
at level between second and third legs, abruptly indented as usual 
opposite bases of first coxae slender acute extensions between coxae 
of legs. 
Spinnerets borne on venter not far caudad of middle of length, 
the abdomen projecting widely over and caudad of them. 
Trochanter IV with an acute black spur beneath at the distal 
end; tibia I with a series of slender spines beneath, (Plate 19, fig. 3); 
tibia II proportionately stouter, more strongly spined with short 
stouter spines on anterior surface, having also two spines toward 
