chamberlin: the arachnida. 265 



Each patella with a single spine on its posterior side. Tibiae I and 

 II with 3-3 spines beneath, two on the anterior side, two on the 

 posterior, and one above; tibiae III and IV the same except for 

 absence of the dorsal spine. All metatarsi with two spines beneath, 

 two in front, and two behind. Claws all strongly pectinate, the 

 teeth increasing in length distad. All tarsi and metatarsi scopulate 

 beneath. 



Female. Length, 17.5 mm. Length of cephalothorax, 7.5 mm.; 

 width, 7 mm. 



Tibia I, 6.8 mm. Tibia IV, 5.2 mm. 



Locality'.— Santa Ana, 3,000 feet, August 3. (Type, M. C. Z. 252, 

 female). 



This species is named in honor of Mr. Herbert Sheftel of New York. 



HoRiocTENUS,^ gen. nov. 



Cephalothorax ovate, convex; thoracic stria long and distinct, 

 radial lines not evident. 



Posterior row of eyes strongly recurved or appearing as two rows; 

 eyes subequal, the medians nearer to each other than to the laterals. 

 Anterior row of eyes recurved ; eyes subequal and nearly equidistant, 

 the median eyes in type a little the smaller. Area of median eyes 

 longer than wide, a little narrower in front. 



Clypeus narrower than length of area of median eyes, receding from 

 the anterior eyes ventrocaudad. 



Labium wider than long. 



Lower margin of furrow of chelicera with one tooth, the upper with 

 three. 



Legs robust. Tibiae of first and second legs armed beneath with 

 three pairs of spines; the metatarsi with a single pair of long spines 

 at the proximal end; metatarsi and tarsi densely scopulate. Tarsi of 

 posterior legs more sparsely scopulate. 



Inferior spinnerets (in type species) not contiguous at base. Su- 

 perior spinnerets with second article short. 



' 8pio?, pertaining to the borders or limits, etc. and Cteuus. 



