1909.] NATURAL SCIENCES OF PHILADELPHIA. 221 



Dendryphantes lanceolatus Cambridge. 



Biol. C. Am. Arachn. Aran., II, 266, 1901. 



La Verbena, March. 



Dendryphantes ootonotatus Cambridge. 



Biol. C. Am. Arachn. Aran., II, 263, 1901. 



Fortuna (B. and T.); Aguas Calientes (Picado); Hatillo (Picado); 

 Turrialba. 



Dendryphantes oomptus n. sp. 



Cephalothorax red-brown, a broad white stripe on each side, margin 

 red-brown; abdomen red-brown in middle, the sides of which are 

 indented three times behind, upper sides white, lower sides with brown 

 stripe; venter red-brown in middle, sides pale; sternum red-brown. 

 Leg I brown, pale on tarsus and base of metatarsus ; other legs yellow, 

 femora with a brown streak each side, and brown bands at tips of 

 patella, tibia, and metatarsus. Length 3 mm. 



From Aguas Calientes, Costa Rica (Picado). 



Dendryphantes pallens Cambridge. 



Biol. C. Am. Arachn. Aran., II, 272, 1901. 



La Palma. 



Sidusa spiralis Cambridge. 



Biol. C. Am. Arachn. Aran., II, 217, 1901. 



La Verbena, March; Tablazo. 



Sidusa tarsalis n. sp. 



Cephalothorax dark red-brown, abdomen blackish, with an oblique 

 white streak on each anterior side, and behind is a broad oblique white 

 mark each side, not meeting in middle; venter blackish; sternum 

 dark red-brown; legs with the femora and tarsi dark red-brown, the 

 other joints pale reddish, especially pale on legs I and II; in legs III 

 and IV the tibia and base and tip of metatarsi dark ; palpi pale reddish- 

 yellow except the dark brown basal joint; mandibles red-brown. 

 Length 8.5 mm. 



Salinas de Albina (Pac), January (Biolley and Tristan). 



Sidusa sulphurea Cambridge. 



Biol. C. Am. Arachn. Aran., II, 218, 1901. 



Orosi, 2d July (Picado). 



Sidusa oonspecta Peckham. 



Occas. Papers Nat. Hist. Soc. Wise, III, 42, 1896. 



Tiribi. 



