from the Lower Amazons djc. 73 



Genus CtenuS (? Ctenus^ Walck.), provisional. 



Diagnosis. — Eyes in three rows, second row straight, by 

 anterior margins, or more or less procurved. Ocular quad- 

 rangle longer tlian broad, as long as broad, or broader than 

 long («'. e. comparing its outside length with the outside 

 breadth of transverse space occupied by posterior central 

 eyes) ; anterior side equal to or narrower than posterior side 

 of quadrangle. Anterior centrals subequal to or less than 

 posterior centrals. Carapace bluffly rounded behind, in some 

 forms abruptly precipitous. Tibiae i. and ii. with five pairs of 

 spines beneath ; no lateral spines in female (present in male). 

 Protarsi i. and ii. with three pairs of spines beneath, no 

 central apical spine beneath ; protarsi iii. and iv. with a 

 single central apical spine beneath. Tarsi i. and ii. and pro- 

 tarsi i. and ii. with scopula beneath. Protarsus iii. with 

 apical scopula, iv. without scopula. Tarsi iii. and iv. with 

 scopula. Tibiffi iii. and iv. with 1 — 1 — 1 dorsal spines. Pa- 

 tella i. and ii. without spines, iii. and iv. with one spine on 

 each side. 



Tarsal claws 2. Claw-tuft present. Patella and tibia i. 

 equal to or much longer than patella and tibia iv. Lower 

 margin of fang-groove with 5 teeth (4 large and 1 small*), 

 upper margin with 3 (1 large and 2 small). Clypeus varying 

 from twice the diameter of anterior centrals to half their 

 diameter. 



Examples: — Clleidyi, sp. n., C.sinuatipes, sp. n., C. minor ^ 

 sp. n., &c. 



Table of Species. 

 Males. 



I. Carapace not raised andg- ibbous at base above. 

 Tibia and tarsus of pedipalp set with thick 

 velvet pad of short soft hair on inner side . . C. holiviensis, sp. n. 

 II. Carapace distinctly raised and gibbous at base 

 above (except hmijipes), slightly bilobate. 

 Tibia and tarsus of pedipalp without pad of 

 soft hair on inner side. 

 A. Protar.-usiv. almo>t or quite straight. Ocu- 

 lar quadrangle broader than long. Second 

 row of eyes straight by anterior margins 

 (in Innyipes sliglitly procurved). 

 i. Length of carapace equal to patella and 

 tibia iii. (Abdomen unicolorous above, 

 black below, with central, pale, longitu- 



* This character is not absolutely reliable; in some females of the 

 same species the number varies from o — 3. 



