48 ARKIV FÖR ZOOLOGI. BAND 2. N:0 19. 



Length of 2d leg 8 mm. 



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A single female from Tatarenda in Bolivia. 



Ctenus Walck. 



C. tatarendensis (Pl. 7, fig. 22 a, b.) 



Female. — Cephalothorax broad oval with an almost 

 straight profile. Colour dark brown with a paler narrow 

 stripe along the middle. This stripe most distirict behind 

 around the ]ong central furrow. Dry the colour is dark 

 blackish brown with a narrow yellow central stripe, that 

 before the central furrow is divided into two branches, of 

 which the middle-one runs forwards to the area of eyes. 

 The whole integument thickly clothed with a short black 

 and yellow pubescence. Region of eyes and clypeus grayish 

 yellow. Clypeus twice as high as the diameter of anterior 

 central eyes. 



Eyes. Anterior centrals about their radius apart, distance 

 from anterior laterals nearly thrice as long. Anterior centrals 

 twice as large as anterior laterals. Second row of eyes straight. 

 Area of central eyes mucli broader than long, narrower in front, 

 posterior centrals much larger. Posterior laterals a little smaller 

 than centrals, the distance from them about their diameter. 



Cheliceres blackish brown, clothed with long grayish white 

 pubescence. Inner margin of fang-groove with three strong 

 teeth equal in size, outer margin with 3 contigous ones, of 

 which the middle-one is much larger than the two others. 



CoxcE of pedipalp and lahium dark blackish brown. 



8ternum broad oval, dark brown, clothed by a dense 

 grayish yellow pubescence. 



Legs 4. 1. 2. 3, darkbrown, clothed by blackish and 

 yellowish hairs. Dry the femur is blackish with two more 

 or less distinct transverse yellowish spöts above, beneath 

 they are one-colured grajdsh. Tibia I with 5 pairs of 

 spines beneath, tibia II with only 4 ones. Metatarsi I and 



II with 3 pairs of spines beneath. Tarsi I — IV and meta- 

 tarsi I — II clothed beneath with very slight scopula, metatarsi 



III and IV only at the apex. Tarsal claws 2, anterior with 

 one, posterior with 3 very small denticles on the first pair of legs. 

 Posterior claws with 3 ones. 



