84 Mr. F. 0. P. Cambridge on Cteaiform Spiders 



Ctenus pJanijyeSy sp. n., ^ . 



Hah. Forest, Santarem. 



Types in coll. Brit. Mus. Nat. Hist. London. 



Total length (including mandibles) 11 mm. 



Colour. Carapace very pale yellow-brown. Abdomen 

 darker brown, with central basal pale band extendi iig to the 

 spinners, the last half" consisting of indistinct transverse 

 spots ; sides paler, spotted with brown. Legs pale olive- 

 brown, clothed with long silky yellow hairs. 



Structure. Caraj)ace very much raised and gibbous at base, 

 inclined towards ocular area. Eyes similar to those of albo- 

 fasciatus ; second row straight by anterior margins, central 

 anieriors much smaller and forming a narrower transverse 

 row than central posteriors. Ocular quadrangle broader than 

 long. Armature of legs similar to others of the group. 

 Tibise i. and ii. with five pairs of spines beneath. Protarsi i. 

 and ii. with three pairs. Lower margin of fang-groove with 

 5, upper witli 3 denticules. 



For structure of pedipalp and organs see PI, IIL fig. vi. b. 

 Tibia with a short, curved, siiarp black spur, directed for- 

 wards along the side of the tarsus, not projecting from the 



A single adult male of this species, which belongs to the 

 group including si'nuatipes, sp. n., curvipes, Keys., and 

 several other forms I have seon, not yet described, was taken 

 in the Forest of Santarem in Feb. 1896. 



Ctenus simiattpes, sp. n., ^ 2 . 



Hah. Costa Rica. 



Types in coll. Brit. !Mus. Nat. Hist. London. 



Total length (including mandibles), ^ 20, 2 22 mm. 



(J. — Colour. Carapace mahogany-brown, with a broad 

 diamond-shaped pale patch behind the eyes and a fine central 

 line following it. Abdomen brown, clotlied with fine golden- 

 brown pubescence ; with a pale, central, longitudinal, dorsal, 

 scalloped band, consisting of five united blotches, clothed with 

 golden -brown pubescence. Underside dull olive-brown. 

 Sternum and legs dull olive-brown, the femora of the latter 

 annulate ; clothed with golden-brown pubescence. 



2 . — Colour similar to that of the male, but much darker. 

 (J . — Structure. Carapace only slightly gibbous at base 

 and slightly concave in profile. Legs similar to others of the 

 genus; scopula slight on apical half of protarsi i. and ii., 

 apex of iii., and none on iv. 



