TULLC4REN, ARANE.5: FR. THE GRAN CHACO. 69 



Fam. Oxyopidae. 



Oxypes Latr. 

 O. ^racilis Keys. (Pl. 8, fig. 34.) 



Keysevling. Verh. zool.-bot. Ges. Wien, 26, 1H76. pag. 098, Pi. II, 

 fig. 64. Cambridge, Biol. Centr. Am. Avaneida II. p. 842. Pl. 32, fig. 

 15 a, b. 



Of this species the collection contains a single adult 

 female and several young ones from Tatarenda in Bolivia. 



O. boliviaiius n. sp. (Pl. 9, fig. 35.) 



Female. — Cephalothorax testaceous yellow, on eacli side 

 witli a broad band, that is blackest behind. This bands 

 are broadly separated from lateral margins of cephalothorax. 

 Region of eyes is blackish and on clypeus there are two 

 parallel blackish bands, that run from anterior lateral eyes 

 to apex of chehceres. The cephalothorax is very high, longer 

 than broad with nearly paraUel side-contours. Central furrow 

 very fine and comparatively long. Cephalic strise distinct. 

 Clothed with scale-like hairs. 



Eyes. — Anterior centrals very small about 1 V- their 

 diameter apart, distance from laterals much shorter. Ante- 

 rior laterals largest of all, about their diameter apart. Poste- 

 rior eyes equal in size, a little smaller than anterior laterals, 

 interval between them nearly equal, about twice their dia- 

 meter. Interval between anterior and posterior lateral eyes 

 as long as the diameter of the former. Clypeus nearly seven 

 times as high as the diameter of anterior central eyes. 



CheMceres conical, a fourth longer than clypeus, testa- 

 ceous yellow with a black longitudinal band on the ante- 

 rior side. 



Coxce of pedipalp and lahium testaceous, spotted with 

 black. On labium there are three longitudinal black stripes. 



Sternum longer than broad, oval, yellowish brown, darker 

 brown at the margins and with more or less indistinct blac- 

 kish markings. 



Legs 1. 2. 4. 3, testaceous yellow Avith numerous blackish 

 spöts or stripes especially beneath on all joints. On all joints 

 except the tarsi numerous black long spines. 



