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 tTiird 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 



