680 PROCEEDINGS OF THE ACADEMY OF [DeC, 



April 8, 1910; Quebrada Clara, north of Liberia', Guanacaste, Jan. 

 13, 1910, immersed itself clinging to rock face (Calvert). 

 Ctenus sp. 



Juan Yifias, 3,200 feet, in arboricolous bromeliad, April 26, 1910, 

 one immature specimen (Calvert). 



Tinus nigrinus Cambridge. 



Rio Liberia and Quebrada de Panteon, Liberia, Guanacaste, 

 Jan. 11 and 12, 1910; along the banks; wings, etc., of Odonata 

 {Hetcerina, Argia and Perithemis) , in its webs, one female with its 

 €gg-ball (Calvert). 



LYOOSIDiE. 

 Xycosa brevitarsis Cambridge. 



Near Hacienda Guachipelin, Guanacaste, 1,700 feet, Jan. 15, 1910 

 (Calvert). 

 Pardosa sp. 



Crater of Volcano Irazu, 10,880 feet, April 1, 1910, one young 

 ,specimen (Calvert). 



OXYOPIDiE. 

 Oxyopeidon molestum Cambr. 



Juan Villas, near Rio Reventazon, May 3, 1910 (Calvert). 



ATTID^. 



Dendryphantes maxillosus Cambr. 



From Juan Vinas, July, 1909 (Calvert). 

 Cobanus mandibnlaris Peck. 



From Banana River region, 4 Nov., 1909 (Calvert). 

 Sidusa fulvoguttata Cambridge.' 



Juan Vinas, 3,200 feet, in arboricolons bromeliad, April 26, 1910 

 (Calvert). 

 Thiodina retarius Hentz. 



Juan Vinas, 2, .500 feet, near Rio Reventazon, March 21, 1910 



(Calvert). 



PHALANQID^. 

 Hernandria ventralis n. sp. 



Black; ventral segments with silvery basal band, also silvery on 

 sides of the posterior segments. Eye-tubercle smooth, with two 

 small granules each side above; dorsal scutum divided into three 

 transverse parts; each with a pair of pale spots, the first part also 



