chamberlin: the arachnida. 185 



Spiracles conspicuously exposed. 



First article of mandible strongly constricted as usual with the 

 article abruptly expanded distad of the constriction and with the 

 dorsal hump conspicuous. Second article long, moderately curved 

 ventrad at middle, the dorsal (anterior) face being somewhat depressed 

 or excavated and bearing a moderate number of short stiff hairs. 

 Fingers of chela crossing at tips, the outer one stouter, longer and more 

 strongly bent at tip, (Plate 4, fig. 3). 



Pedipalps in type about as long as body, but in a second specimen in 

 which the abdomen is strongly retracted they are considerably longer. 

 Coxa strongly elevated above, the ventral process long and subcylin- 

 drical, white in color. Trochanter constricted proximally; at distal 

 end on ventral surface a large conical tubercle. Femur subcylindrical, 

 a few inconspicuous tubercles along ventral surface. Patella unarmed. 

 Tibia along mesoventral line with two long curved spinous processes 

 and two very small ones between the two large and in front of the 

 distal one respectively; along ecto ventral line with two long less 

 curved processes of which the anterior is the larger and near the base 

 of the latter and distad of it a very much reduced spine. Tarsus in 

 mesoventral line with two long processes and along ectoventral line 

 with two large processes and a third smaller process on ectal side be- 

 tween the others and in a second specimen with a small spine in front 

 of others on ectal as well as mesal side. Claw much longer than the 

 tarsus, (Plate 4, fig. 4, 5). 



Legs I to III with femora, patellae, tibiae, and metatarsi tubercu- 

 late, more strongly developed on femora than on more distal joints 

 and more conspicuously ventrally than dorsally. Fourth legs with 

 tubercles of femora largely replaced by more conspicuous conical 

 processes; tubercles of other joints also stronger than on other legs 

 Tarsus I of five segments, of which three are in the second division; 

 II with eight, also with three in the second division; III with four 

 (the most proximal with two false sutures thus giving appearance of 

 seven articles), these densely clothed ventrally with fine short hairs 

 as usual, none of the articles modified specialh'. Leg IV, (Plate 4, 

 fig. 8). 



Length 5.6 mm.; greatest width of carapace 4 mm. 



Length of leg I cir. 8 mm.; of leg II, 14 mm.; of leg III, 11 mm.; 

 of leg IV, 14 mm. 



Locality.— Huadquina, 5,000 feet, July 24. (Type, M. C. Z. 127, 

 one female). San Miguel, 6,000 feet, JuJy. (Paratype, M. C. Z. 128, 

 one female). 



