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CHAMBERLIN: THE ARACHNIDA. 239 
Chelicera of male with fang having a nodule or cusp at base; the 
conspicuous dorsal spine well removed from the line of teeth; upper 
row of teeth with the second tooth from claw; the large tooth, .con- 
spicuously long and stout, six teeth proximad of large tooth. Tooth 
nearest fang on lower margin the largest, the second small. Chelicera 
of female lacking the dorsal spine; teeth of upper margin similar to 
those of the male but the tooth nearest fang more reduced and the 
“big” tooth shorter, (Plate 18, fig. 2). 
Legs with rather numerous spines on the femora, these equal in 
length to diameter of joint or but little longer; spines of more distal 
joints fewer but proportionately longer. 
Male. Length6.l1mm. Length of cephalothorax 2.1 mm.; width, 
1.4 mm. 
fem. __ tib.+ pat. met. tar. total 
Leg I 6 mm. 6.8mm. 5.8mm. 1.8mm. 19.4mm. 
beet) 42 4.2 3.6 dot 1331 
Leg III 2.3 1.6 1.5 9 6.3 
Leg IV 4 one 3 ea 11.4 
Locality.— Tincochaca, 7,000 feet, August. (Type, M. C. Z. 201, 
male; paratypes, M. C. Z. 202, three females). 
TETRAGNATHA SCOPUS,! sp. nov. 
Plate 18, fig. 1. 
Carapace and chelicerae light brown to testaceous. Legs brownish 
yellow to yellow. Sternum from dusky yellow to dusky brown. 
Abdomen with ground-color silver-white covered with a fine network 
of grey. A longitudinal band over the venter in which the light 
dots are much reduced and almost obliterated limited on each side 
by a more silvery line on the outside of which is typically an irregular 
line of dark grey or blackish. Dorsum of abdomen lighter than 
sides and venter; a middorsal longitudinal grey line presenting several 
uneven pairs of branches extending in a caudoectal direction, in 
most specimens a large dark brown or black spot on each side near 
middle of length contiguous with a dark stripe along each side. 
Abdomen conspicuously broadened and gibbous in front; about 
2.7 times longer than the greatest width; dorsal line convex. 
1 oxomos, a watcher. 
