64 bulletin: museum of comparative zoology. 



distad beyond middle of joint. The pars cephalica is more depressed 

 and the cephalothorax proportionately wider. The tj-pe also differs 

 from P. ciibcmis in having the cephalothorax equal in length to tibia + 

 patella IV, not distinctly and considerably longer though exceeding 

 these joints a little in the second female mentioned above. 



ACANTHOSCURRIA NATALENSIS, Sp. nOV. 



Type.— M. C. Z. 88. 9 . Brazil: Rio Grande do Norte; Natal. 

 Stanford 1911 Exped. to Brazil. W. M. Mann. 



Integument of carapace, sternum, legs, palpi, and chelicerae very 

 light chestnut. Carapace and sternum clothed with a dense coat of 

 velvety brown pubescence. Legs clothed chiefly witli similar pubes- 

 cence but grej' abundant and predominating on ventral surface of 

 the femora; ends of joints above with the usual very narrow fringe 

 of cream-colored hairs. Bristles numerous, long, rust-browTi in color. 

 Abdomen very densely clothed mth dark mouse-colored pubescence 

 which is somewhat lighter beneath; the usual long rust-brown bristles 

 above and laterally. 



Pars cephalica relatively high, convex. 



Anterior row of eyes only weakly procurved, a line tangent to an- 

 terior margins of median eyes passing considerably in front of middle 

 of lateral eyes. Anterior median eyes with diameter scarcely differ- 

 ing from the long diameter of the laterals which are elliptic; their 

 diameter apart but only about two thirds their diameter from the 

 laterals. Posterior lateral eyes equalling the anterior ones or scarcely 

 smaller, from these being separated by about their radius. Posterior 

 median eyes small, about two thirds the diameter of the laterals to 

 which they are closer than to the anterior medians. 



Spinules on labium and endites of usual form and arrangement. 



Sternum of moderate convexity. 



Metatarsi I and II scopulate very nearly to base; metatarsus III 

 scopulate from one half to two thirds of its length ; and metatarsus IV 

 not at all scopulate. 



Female (type). — Length, 48 mm. 



Cephalothorax: length, 19.25 mm.; width 16.2 mm. 



