678 PROCEEDINGS OF THE ACADEMY OF [DeC.^ 



unarmed. A. M. E. very much smaller than the other eyes; man- 

 dibles slender, vertical; the tibia of the male palpus is broad and at 

 tip with two acute projections, one of which has a short upper spur. 



A female, which may belong to the same species, is unmarked, 

 and has a vulva as figured. 



Length 5 mm. 



From St. Maria Dota, Costa Rica (Tristan). 



Sillns putUS Cambridge. 



Cache, March 7, 1910 (Calvert). 



AGBLENIDJE. 

 Agelsena sp. 



Juan Viiias, 3,200 feet, in a bromeliad, April 26, 1910, a young^ 

 specimen (Calvert). 



THERIDIID^. 

 Theridion bioUeyi Banks. PI. XXVIII, fig. 7. 



The palpus of the male (previously unknown) is shown in figure; 

 the markings are similar to those of the female. 

 Lithyphantes lugubris Cambr. 



From Cache, March 9, 1910 (Calvert). 



BPEIRID^. 

 Edricus tricuspis Getaz. 



Unknown to the Biologia; one female from Juan Vinas, "farther 

 waterfall," 29 Sept., 1909 (Calvert). A figure of the dorsum is 

 given; the abdomen is shorter than in E. crassicauda. The length, 

 5 mm., given in the Biologia is wrong, as Getaz says the abdomen 

 is 9 mm. long. 

 Tetragnatha alba Cambridge. 



Santa Cruz, Jan. 20, 1910, and Quebrada de Panteon de Liberia, 

 Jan. 12, 1910, both in Guanacaste (Calvert). 



Tetragnatha antillana Simon. 



Cache, stream through coffee plantation, March 3, 1910 (Calvert) - 

 Tetragnatha guatemalensis Cambridge. 



Banana River region, Nov. 4-10, 1910 (Calvert). 

 Tetragnatha mexicana Keyserling. 



Juan Vinas, laguna, 3,300 feet, Feb. 18, 1910 (Calvert). 

 Tetragnatha tenuissima Cambridge. 



Juan Vinas, Feb. 15, 1910 (Calvert). 

 Leucauge hortornm Hentz. 



Juan Vinas, laguna, Oct. 5, 1909 (Calvert). 



