chamberlin: the arachnida. 285 



the hair of black areas of legs black, of the other parts above brown 

 with darker longer bristles intermixed in the usual way, but the light 

 areas beneath clothed with more grey colored hair. Abdomen be- 

 neath solid black; sides grey-brown; dorsum very dark brown, dusky, 

 a median blackish wedge-shaped mark outlined by light lines in the 

 front third of the length, this followed by a series of black chevron- 

 lines each bordered caudad by a light line which commonly termi- 

 nates at each end in a light spot, the light lines clothed with hair 

 which is yellow when dry, there being other spots and streaks of same 

 as well. 



Cephalothorax in profile with the dorsal line rising gradually and 

 moderately from the posterior declivity to the third eyes. 



Anterior row of eyes a little, shorter than the second (17:18), pro- 

 curved as usual; medians larger than the laterals (diameters as 

 19:16) scarcely their radius apart, nearer to the laterals; median 

 eye separated from eye of second row of same size by a distance 

 equal to diameter of lateral eye; anterior lateral eye once and a 

 fourth their diameter from lower edge of clypeus. Eyes of second 

 row with diameter fully twice that of anterior medians, about five 

 eighths their diameter apart. Posterior eyes with diameter three 

 fourths that of the second eyes, not quite three times their diameter 

 apart. Area of four posterior eyes just one fifth total length of 

 carapace. 



Sternum broadly elliptic, three fourths as wide as long. 



Anterior tarsi and metatarsi and distal end of tibiae densely scopu- 

 late; posterior metatarsi scopulate only at distal end. Anterior tibiae 

 with the usual three pairs of spines beneath, these very short as are 

 also the small spines on the anterior and posterior surface. 



Female. Length, 18.5 mm. Length of cephalothorax, 9.4 mm.; 

 width, 7 mm. 



fern. tib. + pat. met. tar. total 



Leg I 7.1mm. 8.1 mm. 5 mm. .3.5 mm. 23.7 mm. 



Leg II 6.5 7.3 5 3 21.8 



Leg III 6 6.8 4.6 3 20.4 



Leg IV 7.8 8.8 7.0 3.7 24.3 



Locality.— Cnzco, 11,500 feet, July 6, 7. (Type, M. C. Z. 283; 

 paratypes M. C. Z. 284, two mature and one immature females and 

 three immature males). 



