]42 On a neio Genus o/ Avicnlaiiidse. 



studded with cusps. Coxa of pedipalps with a very cuspulo.«e 

 basal area. 



Sternum a little longer than wide, with conspicuous poste- 

 rior sigillse, separated from the margin by nearly the same 

 distance wliich divides them. 



Legs 4, 1, 2, 3 without spines; the tarsal scopula of legs 

 I., II., and III. entire, of IV. with a narrow longitudinal 

 band of spiniform bristles. Tliere are no stridulating bristles. 



Palpal tarsus (in female) very bowed at the base ; beyond 

 much depressed, a little hollow, with dorsal series of small 

 spines. 



Male unknown. 



This genus is intermediate between the Ischnocolete and 

 Aviculariese, Simon. From the Aviculariese it differs in the 

 position of the posterior sternal sigillfe (marginal or sub- 

 marginal in all the Aviculariese) and in having the posterior 

 tarsal scopula divided by a longitudinal band of spiniform 

 bristles. It is distinguished from the Ischnocolese by the 

 unarmed legs. From Phlogiodes^ Pocock (to wliicii, by the 

 position of sternal sigillse, it is perhaps allied), it differs in 

 having the thoracic central fovea straight (strongly pro- 

 curved in Phlogiodes) and the anterior row of eyes strongly 

 procurved (only a little in Phlogiodes). From all the Avicu- 

 lariida3 it differs by the anomalous form of palpal tarsus. 



Genotype : 



Ancylocliiros taunayi*, sp. n. 



$ . — 34 mm. 



Cephalothorax very dark red-brown mahogany, clothed 

 with dark pubescence. Cheliceres dark red-brown ; fang- 

 groove with eight black teeth on the inner margin and with 

 long pink hairs. Sternum and coxce of the legs black, densely 

 hairy; labium ^nd. coa-ob of pedipalps a little lighter. Legs 

 dark red-brown, with long rust-coloured hairs. Abdomen 

 black ; the dorsum with three pairs of large, oblique, rusty 

 spots. The whole abdomen with long, semierect, rust- 

 colouied hairs ; ventral area and spinnerets velvety black. 



Carapace a little longer than wide, as long as tibia -h 

 patella I. or lY. and metatarsus-!- tarsus IV., longer than 

 metatarsus -f- tarsus I. 



Anterior eyes equal, in a row and strongly procurved. 

 Posterior medians much smaller than anterior medians, sepa- 

 rated from the anterior medians and posterior laterals by 

 about a diameter. 



* I have much pleasure in naming this form in honour uf Dr. A. de 

 Taunay, Savant Director of the kSao Paulo Museum, at Ypiranya. 



