CHAMBERLIN: THE ARACHNIDA. 197 
highest some distance caudad 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 narrower 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 
basal, 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 
