chamberlin: the arachnida. 267 



the one nearest claw proximad; single tooth of lower margin also 

 small, (Plate 21, fig. 4). 



Sternum moderately convex; anterior margin widely weakly con- 

 vex; caudad acutely narrowly pointed, not separating the fourth 

 coxae; widest near middle; longer than wide in about ratio 5 : 4. 



Epigynum proportionately large, (Plate 21, fig. 3). 



Female. Length, 9 mm. Length of cephalothorax, 4 mm. ; width, 

 3.1 mm. 



fem. tib.+pat. met. tar. total 



Leg I 3.25 mm. 4.2 mm. 2.2 mm. 1.6 mm. 11.25 mm. 



Leg II 3.0 4.0 2.0 1.5 10.5 



Leg III 3.0 . 3.5 2.0 1.4 9.9 



LeglV 3.5 4.8 3.8 2.0 14.1 



Tibia I, 2.9 mm. Tibia IV, 3 mm. 



Localities.— 0\\2iiit^Yta.mho, 9,000 feet, July. (Type, M. C. Z. 

 254, one female). Urubamba, 9,500 feet, July!^ (M. C. Z. 255, two 

 females). 



Gayenna monticola, sp. nov. 

 Plate 22, fig. 6. 



Carapace yellow; a dusky median longitudinal line which is gemi- 

 nate back of the eyes as in Pirata sp.; also a dusky supramarginal 

 stripe on each side extending forward to the head. Sternum yellow, 

 dusky at margins. Endites yellow. Labium dusky yellow. Legs 

 yellow, dark about the bases of spines and in other small spots, giving 

 the appearance of broken annulations on the proximal joints. Integu- 

 ment of abdomen greyish brown; above with a narrowly lanceolate 

 dark median stripe at base, followed by a series of paired dark marks 

 which extend to a little in front of the spinnerets, the two lines con- 

 verging caudad; a dusky stripe along each dorsolateral line proxi- 

 mally below which are scattered inconspicuous dark spots; venter 

 clear excepting for an interrupted median longitudinal dark line. 



Posterior row of eyes moderately procurved; median eyes once and a 

 half their diameter apart, their diameter from the laterals which are a 

 little the larger (diameters about as 7:6). Posterior laterals subequal 

 to anterior laterals from which they are separated by four sevenths 

 their diameter. Anterior row pf eyes straight, decidedly shorter than 

 the posterior; laterals larger than the medians (diameters as 7:6); 

 medians near their radius apart, contiguous with the laterals or nearly 



