1908.] NATURAL SCIENCES OF PHILADELPHIA. 189 



Face of average height and shape. 



First row of eyes but shghtly prociirved, much shorter than the 

 second ; anterior median eyes about their diameter apart, only half so 

 far from the lateral eyes, of usual distance from eyes of second row; 

 anterior lateral eyes situated as usual; eyes of the second row 

 more than their diameter apart, half as far again from the eyes of the 

 much wider third row; quadrangle of posterior eyes not entirely one- 

 fourth as long as the cephalothorax. 



Labium much wider than long (8.25 : 6.5) ; basal excavation very 

 short, scarcely more than one-sixth the length of the labium ; labium 

 anteriorly strongly attenuated, sides rounded just above basal notch, 

 but above nearly straight for most of length; antero-lateral angles 

 widely rounded; front margin gently widely incurved. (PI. YIII, 

 fig. 3.) 



Legs with the tibia + patella of the fourth pair of the same length 

 as the metatarsus ; tibia + patella of the first pair clearly shorter than 

 the length of the cephalothorax; spines of anterior tibiae of usual 

 form and arrangement; tarsi of anterior pairs Avith thin scopulse at 

 sides. 



Eipigynum a strongly chitinized suboval area which is truncate 

 behind ; the posterior foveas relatively small, circular, deep and abruptly 

 delimited; lateral ridges bent inward toward each other behind, the 

 space between their ends occupied by the posterior end of the short 

 clavate guide which separates the foveae; the anterior and greater 

 area of the epigynum scarcely depressed each side of the median line. 

 (PI. XIII, fig. 8.) 



Total length, 9 mm. Length of the cephalothorax, 3.S nun.; 

 width, 2.9 mm. 



Length of leg I, 9.8 mm., tib. + pat., 3.3 mm.; met., 2 mm. 



Length of leg II, 9.7 mm. 



Length of leg III, 9.6 mm. 



Length of leg IV, 13.4 mm. ; tib. + pat., 4 mm. ; met., 4 nmi^ 



Type locality. — Colorado. 



Known localities. — Colorado!, Utah!, 



In some respects this species is like granlandica. The cephalothorax 

 is smaller with the head narrower and more elevated. It is also 

 darker and its markings are less distinct. The epigynum seems con- 

 stant in its form and is easily distinguished from that of grcenlandica. 

 The median piece of guide at times is similarly soiuewhat elevated 

 anteriorly. 

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