TULLGREN. ARANE^ FR. THE GRAN CHACO. 55 



ber of specimens of which the mos t are young females. They 

 belong to only se ven species, which as I believe all are new 

 for the science. 



Tahle of species, 



Males. 



A. Sterniim yellowish brown without 



black markings. L. 17 mm. . . . L.malitiosan.sp. 



B. Sternum more or less blackish. 



a. Sternum yellowish brown with a 

 broad black central band. Ven ter 

 yellowish brown or with a black 

 spöt. Legs above grayish white, 

 beneath more or less blackish. Size 



smaller, 16 mm L. Nordenskiöldi n, sp. 



b. Sternum one-coloured blackish 

 brown to black. Venter black. 

 Legs dark redbrown. Larger spe- 

 cies, 21,5 mm L. gulosa n. sp. 



Females. 

 A. Sternum. coxae and at least a large 

 spöt on the venter of abdomen black 

 or blackish brown. 



a. Smaller size, 7,8 mm. Vulva with 

 a large median bar, that back- 

 wards is half-moon-shaped. This 



part is not longer than broad. . L.[securifer n. sp. 



b. Larger size, 20—30 mm. 



X Vulva with a median bar, that is 

 about thrice as long as broad 



behind. L. 30 mm L. excussa n. sp. 



XX Vulva with a median bar, that 

 is at the most twice as long as 

 broad behind. 

 y The median bar forwards very 



dilated. L. 21 mm L. gulosa n. sp. 



yy The median bar forwards not 

 dilated. 

 t The median bar extraordinary 

 narrow, as long as broad be- 



