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,4mm.; width, 
3.1 mm. 
fem. tib.+ pat. met. tar. total 
‘Leg I 3.25mm. 4.2mm. 2.2mm. 1.6mm. 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 was) 
Leg IV 3.5 4.8 3.8 2.0 14.1 
Tibia I, 2.9mm. Tibia IV, 3 mm. 
Localities— Ollantaytambo, 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 of 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 
