1882.] SPIDERS FROM MADAGASCAR. 767 



falces large and powerful, the movable claw curved and tapering to 

 a fine point ; palpi short, but with rather long, subcylindrical, slightly 

 incurved, pointed, hairy terminal article ; legs as usual short and 

 hairy, with the femora somewhat flattened ; sternum pentagonal, 

 scutit'orm. Abdomen transverse, unequally hexagonal, the angles 

 mammoid, terminating in short acute spines, somewhat ascending ; 

 the form of the abdomen, irrespectively of the angles, forms a 

 truncated cone rather wider than long ; the anterior margin is con- 

 vex in the centre and projects at the anterior angles in the form of 

 an obtuse tubercle in front of the anterior spines ; the dorsal surface 

 is nearly flat, slightly convex, granuiose-punctate, with the impressed 

 spots represented by rather large shallow depressions ; the ventral 

 surface is strongly granulose, shelving, and deeply pitted at the 

 sides, convex and transversely plicated in the centre. Entire length, 

 including the posterior pair of spines, 4 millim. ; width of abdomen, 

 including spines, at widest part, 5| millim., at posterior lateral spines 

 4 millim. 



Two examples : Central Madagascar. 



It is possible that this may be the male of some species described 

 from the female ; but if so, the form of the abdomen difi^ers so much 

 as to preclude a cabinet-naturalist from determining to which species 

 it should be assigned. 



TJlobo rid^. 

 Uloborus, Latreille. 

 7. Uloborus velutinus, sp. n. (Plate LVII. figs. 6, 6 a, 6 b.) 



Cephalothorax, sternum, and coxal joints of legs dull black, covered 

 with white pilosity ; when dry the cephalothorax is brown with a 

 white dorsal spot ; remainder of legs whitish, the femora indistinctly 

 barred with red-brown, the tibiae partly red-brown, the hairy clo- 

 thing partly tipped with black ; tarsi yellowish, with black terminal 

 articles ; abdomen dull velvety-black, with four whitish dots in an 

 arched series across the front, a broad transverse oblong yellowish 

 patch on each side before the middle, two minute white specks in 

 the dorsal region between the latter, and two small white spots to- 

 wards the posterior extremity, ventral surface greyish. 



Cephalothorax bell-shaped, shelving, slightly depressed behind 

 the caput ; eyes arranged much as usual ', but the posterior lateral 

 eyes as large as the posterior central pair : abdomen oval, shelving 

 obliquely in front and behind ; viewed laterally it is cuneiform with 

 the short anterior margin arched ; the edge of the transverse ridge 

 is depressed in the middle, leaving two obtuse humps, one on either 

 side ; ventral surface deeply and transversely depressed behind the 

 spinnerets, convex and irregularly plicated behind this depression ; 

 legs 1, 4, 2, 3, the anterior pair long, the femoral and tibial ar- 

 ticles thick and slightly compressed, the tibiae fringed towards the 

 distal extremity with hair, tarsi slender ; remaining legs compara- 

 tively weak, cylindrical. Entire length 5 millim. 



East coast of Madagascar. 



' See Simon, Hist. Nat. des Araignees, p. 244. 



Proc. Zool. Soc— 1882, No. LI. 51 



