chamberlin: the arachnida. 215 



rounded ; about two thirds as wide at middle as long, length in meas- 

 ured specimen 1.6 mm., (Plate 9, fig. 8). 



Endites very long, arched and meeting in front of labium in usual 

 way. Endites and labium covered with stiff short hairs like those of 

 sternum. 



Claw of chelicera small ; apparently less strongly curved than usual 

 in the family; chitinous appendage rather large, overlapping apical 

 portion of claw, (Plate 9, fig. 7, 9) covered with stiff bristles. 



Clypeus very wide, the distance from lower edge to edge of anterior 

 median eyes being 1,35 mm. 



Anterior median eyes rather less than their radius from each other; 

 six times their diameter from the anterior laterals. Anterior row of 

 ej'-es seen from above slightly recurved, a line tangent to caudal edges 

 of median eyes being tangent to anterior edges of the laterals. Lateral 

 eyes of each side equal in size and clearly larger than the anterior 

 median eyes, a little less than their diameter apart, (Plate 9, fig. 6). 



Palpi lacking claw. Stridulating tubercles of palpus only four in 

 number in specimen described. The stridulating plate of the cheli- 

 cera, (Plate 9, fig. 7). Palpi covered with stiif bristles like those of 

 mandibles, etc. 



Claws of legs curved; each with a single row of usually 12-13 teeth, 

 (Plate 9, fig. 10). The spines and bristles on legs and body with regu- 

 lar dark longitudinal ribs which under high magnification are seen to 

 be serrated. The distal end of the spines is acute but that of the 

 bristles is in the form of a crown of teeth, (Plate 10, fig. 3). 



Bristles on legs short and stiff, spinescent, arranged in regular 

 rows, the spines inserted in line with the bristles. On the femora 

 are two rows of bristles below^ and three rows above, the sides being 

 covered with bristles irregularly arranged. Patellae with five less 

 regular rows above, of which the three median rows are best developed; 

 below with irregular bristles. Tibiae, metatarsi, and tarsi with two 

 rows above, two on each side, and two below. Fine short hair be- 

 tween the rows on all the joints, (Plate 10, fig. 2, 3). 



The tibiae of all legs have six pairs of spines beneath and the meta- 

 tarsi four or five pairs. On the anterior surface of tibiae I and II are 

 five spines in lower row of bristles and four in the upper; tibia III has 

 five in the lower and three in the upper; and tibia IV has four in the 

 lower and one in the upper. On the posterior surface of tibia I there 

 are six spines in the lower row of bristles and six in the upper; tibia 

 II has six in the lower row and seven in the upper; and tibiae III and 

 IV six in the lower and five in the upper. On the anterior surface 



