chamberlin: the arachnida. 197 



highest some distance eaudad of eyes. Thoracic fovea some distance 

 back of middle of carapace; straight, transverse. 



Sternum subequal in length and breadth, being sometimes slightly 

 longer than wide (male) and sometimes slightly wider than long 

 (female). Moderately convex. Sigillae submarginal. 



Labium a little wider than long. Spinules in a transverse band of 

 about four rows, irregularly and closely arranged. 



All tarsi densely scopulate; the scopulae of the anterior tarsi 

 divided by a narrow setose line, those of the posterior tarsi by a broad 

 setose band which, however, is narrow^er than the joint. Anterior 

 metatarsi scopulate mostly more than half way to base, the posterior 

 metatarsi scopulate at distal ends only. Hair on anterior surface of 

 coxa I both above and below suture moderately long, in part prone, 

 with in addition a number of finer and shorter straight hairs which 

 tend to be somewhat clubbed at tip; no spinescent bristles. Paired 

 claws bearing from three to four moderate teeth, commonly three or 

 two being fully developed with one or two appearing as mere points, 

 (Plate 7, fig. 1, 2). In addition to the scales of the ordinary type 

 occurring on dorsal surface of tarsi, (Plate 6, fig. 5) occasionally one of 

 the second type, (Plate 6, fig. 6), is to be seen. 



Metatarsus I ventrally with an apical and a subbasal spine, a long 

 one also on anterior surface. Tibia of male with three spines along 

 ventrocaudal line and a fourth a little more dorsad; or with spines 

 as many as seven to none, there being on caudoventral surface three 

 l)asal, two submedian and one apical, and on anteroventral a pair 

 toward apex and one lateral surface (male from Huadquina); the 

 number may differ on the right and left legs of same specimen. 

 Patella armed with a spine on caudal surface (male) . Metatarsus IV 

 with three pairs of ventral spines and two on anterior and also on 

 posterior surface (female) or with five or six on each lateral surface 

 (male). 



Inferior spur of tibia I of male longer than the superior, moderately 

 curved and bearing a large stout black spine inserted on its dorso- 

 caudal surface. The superior spur bearing a similar stout spine on 

 mesal surface, (Plate 6, fig. 7). 



Tibia of male palpus thicker proximally than patella or femur, 

 narrowing distad ; a narrow ridge on mesal side from middle distad, 

 elevated at distal end into a low tubercle. Tarsus short, bilobate 

 as usual. Palpal organ with spine in lateral view appearing at right 

 angles to the main axis of bulb, narrowing distad, with apex slender 

 and acute, below tip with a short, stout, subtriangular spur. In 



