chamberlin: new spiders of the family aviculariidae. 67 



posterior edge distally convex so that the apex appears slightly bent 

 forward. Bulb globose; spine short, at apex with a short acute 

 point at the base of which is a semicircular, disc-like carinal elevation 

 in place of the somewhat retrorse process in A. geniculata, proximally 

 with a slightly raised spiral edge. 



Male (type). Length, 50 mm. 



Cephalothorax: length near, 21 mm., its broken condition making 

 more than an approximation impossible. 



This species is like A. geniculata in having numerous plumose hairs 

 over entire length of femur I on the anterior side. From that species 

 it differs in the male palpal organ and in having the white stripe across 

 ends of joints narrower, etc. 



Acanthoscurria dubia,^ sp. nov. 



Type. M. C. Z. 93. 9 . Habitat unknown. 



Carapace dark chestnut, clothed densely with intermingled grey 

 and reddish brown pubescence. Chelicerae with similar pubescence, 

 the grey prevailing above, and in addition ^^ ith numerous long reddish 

 bristles along mesal part of dorsal surface and over entire anterior 

 surface above base of claws; bristles of the fringe reddish. Sternum 

 chestnut densely clothed with brown pubescence and longer brown 

 bristles. Legs densely clothed with velvety grey and brown pu- 

 bescence intermixed and very numerous long rufous bristles. The 

 bristles, especially on patellae and tibiae, tend to be absent from 

 longitudinal stripes (paired) which in consequence appear as lighter 

 grey streaks. Ends of joints above with lighter transverse narrow 

 band of hair. The abdomen with the usual dense velvety coat of 

 pubescence, brown with much grey intermLxed; numerous long 

 rufous bristles above and laterally. 



Cephalothorax longer than tibia -t- patella I ; a little narrower 

 than tibia -^- patella IV. 



' dubius, doubtful. 



