from the Lower Amazons (be. 87 



also the patella), with a short bluntly rounded spur on outer 

 side above at apex, with a second shorter curved spur below 

 and a short, more slender spur lying between, directed towards 

 the base of tarsus. Base of tarsal sheath with small sharp 

 triangular spur on outer side above. 



Eyes. Second row straight by anterior margins ; ocular 

 quadrangle broader than long, narrower in front, central 

 anteriors a little smaller than posteriors. 



CJypeus narrow, equal to one half diameter of anterior 

 centrals. 



Colour. Carapace, legs, sternum, and mouth-parts rufous- 

 brown. Abdomen with pale scalloped longitudinal dorsal 

 band. Lateral area streaked with black. 



K.B. — These specimens, having been some time in spirit, 

 possibly have not preserved their colouring. 



It is not improbable that this species may be the male of 

 jmnciulatus, Hentz, though there are no black longitudinal 

 lines on the carapace, as he points out is the case in his species. 

 I am not aware tliat these two American species have ever 

 been adequately figured. The specimen described above is 

 one of two males from N. America. (PI. III. fig. v. 1, 2.) 



Ctenus serratipes, sp. n., <^ ? . 



Jffah. Demerara. 



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



(S . Tot. len. 18 mm., carap. 8*5 ; pat. + tib. i. 13, iv. 13'5 ; 

 legs i. 37*3, iv. 39. 



(? . — Colour. Carapace, legs, and abdomen ferruginous 

 brown (dried .specimen). 



$. — Colour the same (dried specimen). 



<J. — Structure. Ocular quadrangle longer than broad; 

 second row of eyes procurved. Details of the structure of 

 the tibial spurs and of protarsus iv. will be found in the table 

 of species. 



Central lobe of palpal organs deeply bilobate. 



A single male and female in the Museum collection from 

 Demerara. The vulva of the female was not sufficiently 

 preserved to furnish a reliable figure or description. (PI. III. 

 tigs, vi.c and vii. d.) 



Ctenus mediuSj Keys. (J* new to science). 



Bah. Theresiopolis, S. Brazil. 

 Type in coll. Brit. JNIus. Nat. Hist. London. 

 (J. Tot. len. 22 mm., carap. 11-5; pat. + tib. iii. 13; 

 i. 17, iv. 15-75. 



