TULLGREN, ARANE.E FR. THE GRAX CHACO. 53 



Cephalothorax oval, longer than broad and modera tely 

 convex or high. Central furrow long and fine. Anterior row 

 of eyes rather procurved. eyes about equal in size and central 

 ones mucli more approached to each other than to lateral 

 eyes. Area of central, eyes much broader than long, narrower 

 in front, with posterior eyes largest. Posterior row about as 

 long as anterior one and strongly recurved, with eyes nearty 

 equal in size. Clypeus in the middle not higher than the 

 diameter of anteiror central eyes. Anterior lateral eyes nearly 

 touching the margin of clypeus. Cheliceres with three equal 

 strong teeth at inner margin of fang-groove. Legs ver}^ 

 long with numerous long spines. Tarsi and anterior nieta- 

 tarsi with a short scopula. Superior mamillye with a large 

 conical apical joint. 



A. Mfasciatus n. sp. (Pl. 7, fig. 25). 



Female. — Cephalothorax elongate-oval, very narrow in 

 front, profile nearly straight. Central furrow long and fine, 

 cephalic and thoracic strise distinct. Colour by a fuUgrown 

 female dark reddish brown with paler indistinct central and 

 two lateral bands. Margin blackish brown. By a subadult 

 specimen the colour is more or less testaceous-brown with a 

 narrow black margin and the central and lateral longitudinal 

 bands distinct yellow. 



Eyes. — Anterior row very much procurved with central 

 eyes about their radius apart and the distance from the 

 equal large lateral eyes about twice as long. Area of central 

 eyes much broader than long and much narrower in front. 

 Posterior centrals nearly twice as large as anterior ones. Po- 

 sterior row strongly recurved with eyes nearly equal, centrals 

 about their diameter apart and distance from lateral eyes a 

 little longer. Lateral eyes nearly equal in size and a little 

 more than twice their diameter apart. Anterior laterals 

 slightly prominent. Clypeus as described above. 



Cheliceres dark reddish brown, clothed with long blackish 

 hairs. Inner margin with 3 strong equal teeth. outer margin 

 with 3 ones, of which the middle-one is largest. 



Coxce of pedipalp and labium dark reddish brown with 

 testaceous tips. 



Sternum oval, very little longer than broad, dark brown 

 with a narrow påle yellowish stripe along the middle. 



