chamberlin: the arachnida. 203 



point, the eyes being set obliquely to the horizontal plane. Anterior 

 row of eyes in dorsal view a little procurved, in anterior view strongly 

 recurved. Anterior median eyes inclusive of rim with diameter more 

 than three fourths as great as that of the anterior laterals, less than 

 their radius from each other and closer to the laterals; exclusive of 

 rim the median eyes are less than their diameter apart and are near 

 their radius from laterals. Anterior laterals very oblique, the anterior, 

 narrow end lying in front of the ectal edge of the median eye. Pos- 

 terior lateral eyes clearly smaller than the anterior laterals (diameters 

 nearly as 3:4). Posterior median eyes smaller than laterals, closer 

 to them than to the anterior medians. A line tangent to the caudal 

 edges of posterior eyes on each side is tangent to or passes near caudal 

 edge of anterior median eye of opposite side, (Plate 7, fig. 9, 10). 



Cephalothorax broad and low anteriorly (the width across eye area 

 to greatest width about as 47:76). Thoracic fovea small, oval, 

 transverse, situated considerably behind middle of length of carapace. 



Labium much wider than long, with anterior margin mesally in- 

 curved. On anterior edge with two spinules present, a scar in t>T)e 

 seeming to indicate the normal presence of a third one. 



Endites at proximal corner with a small group of few (8-10) spinules. 



Sternum as wide as long. The sigillae marginal. 



Tarsi of legs slender, all conspicuously curved, those of the anterior 

 pairs most strongly so. Paired claws each with a double row of mostly 

 eight teeth. Inferior claw smooth, slender. Metatarsus I with three 

 pairs of ventral spines; femur I with a spine at distal end on ante- 

 rior side and above and another smaller one on the posterior side; 

 other femora with corresponding spines, the posterior one increasing 

 in size in going caudad. Posterior metatarsi much more strongly 

 spined. None of the tarsi spined. 



Posterior spiimerets as long as abdomen; slender; articles sub- 

 equal, the first thickest, the distal one most slender, narrowing distad. 

 Anterior spinnerets short, distally acuminate. 



Female. Length 8.4 mm. Length of cephalothorax 3.4 mm.; 

 width, 2.8 mm. 



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



Leg I 3.4mm. 4.5 mm. 2.9 mm. 2.2 mm. 13.0mm. 



Leg II 3.1 4.1 2.8 2.2 12.2 



Leg III 2.9 3.8 2.8 2.0 11.5 



Leg IV 4.0 5.0 4.0 2.5 15.2 



Loca%. — Huadquina, 5,000 feet, July. (Type, M. C. Z. 146, 

 female). 



