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. Length 6.1 mm. Length of cephalothorax 2.1 mm.; width, 

 1.4 mm. 



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



Leg I 6 mm. 6.8 mm. 5.8 mm. 1.8 mm. 19.4mm. 



Legll 4.2 4.2 3.6 11 13.1 



Leg III 2.3 1.6 1.5 .9 6.3 



Leg IV 4 3.3 3 1.1 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 gre;s'. 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 oKoiTos, a watcher. 



