- 15 - 



what longer than and nearly twice as broad as tibia, almost spheric, 

 yet a little longer than broad, strongly convex on both sides, most 

 strongly so on the inner side. Fingers curvate, considerably shorter 

 than the hand. 



Mandibles: galea robust, moderatel t v long, in and near the extre- 

 mity with 5 to G long teeth. 



Legs on the outer side provided with short, davate hairs, on the 

 inner side with pointed hairs. The femora of the two posterior pairs of 

 legs distinctly broader than those of the anterior ones. Claws simple. 



Length about 2 mm. 



The males resemble the females, but are some what smaller, the 

 upper surface of the hand more opaque, the fingers little shorter than 

 the hand and are especially distinguished by the galea being very 

 short, slender and pointed without teeth. 



Paraguay: Puerto Bertoni 2 specimens (A. Bertoni de Winkelried). 



Subgenus Chelifer sens. str. 



Two eyes. Cephalothorax generally with two transverse grooves. 

 Hairs more or less davate. 



Synopsis of the South American species. 



1. Fingers about as long as hand 2 



Fingers mudi shorter than hand 5 



2. Femur very slender, mudi longer than cephalothorax, the claws 



generally provided with an internai tooth, cephalothorax towards 



the sides with dispersed, stronger granules Ch. cancroides L. 



Femur somewhat longer or shorter than cephalothorax, claws 



without tooth, cephalothorax with no stronger granules . 3 



3. Coxa of palps granulated and opaque . . Ch. rufus Balz. 

 Coxa of palps smooth and glossy 4 



4. Femur slender, about 4 times as long as broad, cephalothorax be- 



hind the posterior groove in colour uniform with the rest of 



cephalothorax Ch. Canestrinii Balz. 



Femur less slender, 3 times as long as broad, cephalothorax be- 

 hind the posterior groove whìtish with a brown spot in the 

 middle Ch. Germainii Balz. 



5. Femur yevy robust, about twice as long as broad Ch. rudis Balz. 



Femur less robust, about 3 times as long as broad Ch. exili- 



manus Balz- 

 Femur slender, 4-7 times as long as broad Ch. longichelifer Balz. 



