from the Lower Amazons tSdc. 69 



Brit. Mus. Nat. Hist. London. New Granada, St. F^ de 

 Bogota. — Included under Gtenus bj Keyserling in Bras. 

 Spinn. 1891. 



1877. Microctenus adustus, Keys. ? , H mm. Verhand. 

 z.-b. Ges. Wien, p. 690, t. ii. (viii.) fig. 58. Type in coll. 

 Brit. Mus. Nat. Hist. London. New Granada, St. Fe de 

 Bogota. — Included under Gtenus by Keyserling in Bras. 

 Spinn. 189 L 



1877. Microctenus parvus^ Keys. J", 8'2 mm. Verhand. 

 z.-b. Ges. Wien, p. 692, t. ii. (viii.) figs. 55, 5Q. Type ? 

 in coll. Brit. Mus. Nat. Hist. London. New Granada, 

 St. F^ de Bogota. — Included under Gtenus by Keyserling 

 in Bras. Spinn. 189 L 



1881. Microctenus curvipes^ Keys. ^J , 18 mm. Verhand. 

 z.-b. Ges. Wien, p. 579, t. xvi. fig. 24. Type in coll. 

 Dr. Koch, Niirnberg. Panama. 



1887. Microctenus humilisj Keys. $, 1I'4 mm. Verliand. 

 z.-b. Ges. Wien, p. 456, pi. iv. fig. 35. Type in coll. 

 Cambridge Museum, Mass., U.S.A. Central America, 

 Nicaragua. 



1886. Microctenus ravidus, E. Sim. ? , 16 mm. Bull. 

 Soc. Zool. Fr. ii. N. Patagonia. — Without figures it is 

 next to impossible to ascertain the species. It belongs, 

 however, to that group in v/hich the second row of eyes is 

 prociarved, the ocular quadrangle broader than long. The 

 anterior centrals smaller, closer together, and the clypeus 

 equal to one diameter of anterior central eyes. 



Genus IsocTENUS, Bertk., 1880. 



1880. Isoctenus foliiferus, Bertk. $ juv., 11 mm. Mem. 

 Cour. Acad. Belg. xliii. p. 61. Brazil, Chapeo d'uvas, Rio 

 de Janeiro. — According to Keyserling, Bras. Spinn. 1891, 

 p. 143, this si)ccics belongs to Cteitus^ Keys. Bertkau 

 mentions five pairs of spines beneath tibite i. and ii., so that 

 very likely there is no real generic distinction j but one 

 cannot say without seeing the type. 



1880. Isoctenus hicolor, E. van Betiedcn. ? j^v,, 16 mm. 

 Bull. Acad. P>e]g. (2) xiix. p. 657. Loc. ignolu, probably 

 Brazil. — There is very little evidence as to its identity to 

 be drawn from the description, save that it belongs to the 

 group here characterized as Gtenus. " Tibioe i. and ii. with 

 five pairs of spines beneath." Van Benedcn himself says 

 ^''Gtenus, Keys., ncc Walck." 



