92 Mr. F. 0. P. Cambridge on Ctenijorm Spiders 



Genus Pycnoctenus, L. K., 1878. 



1878. Pycnoctenus^ L. K. — I have not yet seen a form from 

 the New World which I could assign to this genus. 



Genus Cycloctenus, L. K., 1878. 



1878. Cycloctenus^ L. K. — No form which I have met with 

 yet from the New World would seem to belong to this 

 genus. 



Genus Stenoctenus, Keys., 1880. 



1880. Stenocteniis gracilis, Keys. $,8mm. Verhand. z.-b. 

 Ges. Wien, p. IHI, t. iv. fig. 29. Type in coll. Warsaw 

 Museum. Aimable Maria, Peru. — I have not seen the 

 type of this species, also the type of the genus ; but of this 

 and Senocuhis Keyserling says (p. 337) : — " Diese und die 

 folgendeGattunggehoren in der niit drei Klauen am Ende 

 der Tarsen," &c. 



Another species which was found in Keyserling's collec- 

 tion under the name 8. pallidus, from Brazil, I describe 

 below, since I can find no description of it. 



Keyserling placed Stenoctenus and Senoculus under the 

 Ctenoidffi. 



Stenoctenus pallidus is closely related to, if not identical 

 with, " Labddcus,^^ Cambr., a tliree-clawed form with 

 Ctenoid eye-formula. 



In 1880 (Bull. Soc. Zool. Fr. v. p. 152) M. Simon says 

 of Labdacus : — " 11 tient en effet de pi 6s aux Cte.nus, aux 

 Oxyopes, aux Podophthalnin, aux Triclaria, C. K." — " jiour 

 nous il se rattache cependant c\ la famille des Ctenida3." 

 This must have been before M. Simon decided upon re- 

 garding the tarsal claws as of mure importance than resem- 

 blances in the eye-formula. 



The type of Labdacus, Cb., and Stenoctenus pallidus 

 certainly have no connexion with the true Ctcniuie with 

 two claws, save a certain resemblance in the eye-position. 



Stenoctenus pallidus, sp. n. 



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



Kio de Janeiro, Sao Antonio. 



^ . — Colour. Carapace dull orange, suffused on the margins 

 "with dusky black. Mandibles dull orange. Sternum, 

 maxilla^, and legs j)ale straw-yellow. Abdomen pale yellow, 

 its lateral margins reticulated with black streaks. Dorsal 



