chamberlin: the arachnida. 225 



thoracic groove to the caudal margin where it is reduced to a mere 

 line, the carapace elsewhere with scattered small dark dots. Legs 

 dilute testaceous to nearly grey; femora toward distal end with two 

 darker, somewhat reddish brown, annuli incomplete dorsally and 

 with more indistinct dark cross-marks more proximad ; patellae with a 

 dark annulus over most of length; tibiae with three annuli, one sub- 

 basal, one distad of middle, and one distal or with the dark color more 

 diffused and no distinct annuli indicated. Abdomen dull grey, more 

 or less closely mottled wdth very small, not strongly contrasting, silver 

 spots, a clear narrow median stripe free from spots extending three 

 fourths the distance to the caudal end; on each side of median stripe 

 two or more pairs of dark dots of which one pair near the caudal and 

 one near the anterior end are more conspicuous. 



Eye-tubercle conspicuous, subdivided by a y-shaped furrow with 

 the branches cephalad, the tubercle between them bearing the anterior 

 median eyes and each lateral tubercle bearing two lateral and the one 

 posterior median eye of the corresponding side. Anterior row of 

 eyes strongly procurved both in dorsal and in anterior view as in 

 Smeringopus; median eyes much smaller than laterals the diameter 

 of which is somewhat more than 1.5 times greater, less than their 

 radius apart and only their radius from the laterals. Posterior row 

 of eyes a little procurved; median eyes smaller than the laterals 

 (ratio of long diameters near 5:6), very close to laterals, once and a 

 third their long diameter apart. Lateral eyes equal or nearly so, 

 their radius or a little less apart. Area of median eyes in dorsal view 

 trapeziform, narrower in front than behind in about ratio 25:43, 

 longer than greatest width (ratio 7:6), (Plate 13, fig. 2). 



Clypeus high, nearly twice as high as length of median eye area. 



Cephalothorax convex and very high. Thoracic groove very deep, 

 radial impressions distinct. Pars cephalica small, not elevated. 



Sternum wider than long nearly in ratio 3:2. 



Labium large, convexly rounded at tip, (Plate 13, fig. 3). 



Paired claws with eight to twelve long teeth, (Plate 14, fig. 5). 

 Unpaired claw with a single long tooth, (Plate 13, fig. 7). Bristles of 

 legs with slender teeth near base, mostly two to four in number on one 

 side but one or more may also be present on the other, while in a 

 number near the claw the number of branches or teeth is much larger, 

 (Plate 13, fig. 9; Plate 14, fig. 2). A feather-hair, of which a pair 

 occur near claw of leg I, is represented, (Plate 14, fig. 1). 



The abdomen is distinctly higher than long. The spinnerets are 

 borne considerably farther forward beneath abdomen in the female 

 than in the male, {(^. Plate 13, fig. 1). 



