PULMONARIiE. 179 



mit us to pass from the Mygales to the Lycosae and other hunting 

 or wandering Spiders. The Mygales are true tapissieres or true 

 spiders which line their galleries with silk and in fact, it was in 

 this division that the Aranea avicularia of Linnaeus was formerly 

 placed. 



This second division comprises the two following subgenera. 



Dysdera, Lat. 



But six eyes arranged in the figure of a horse-shoe, the opening in 

 front; the chelicerae very stout and projecting; jaws straight and 

 dilated at the insertion of the palpi(l). 



Filistata, Lat. 



Eight eyes grouped on a little eminence at the anterior extremity 

 of the thorax; the chelicerae small; the jaws arcuated on the outer 

 side, and surrounding the ligula(2). 



We now pass to Araneides with but one pair of pulmonary sacs, 

 and as many stigmata. They all have palpi formed of five joints, 

 inserted into the external side of the jaws near their base, and most 

 frequently in a sinus; a ligula extending between them, either nearly 

 square, triangular or semicircular, and six fusi at the anus. The 

 last joint of the palpi, in the males, is more or less ovoid, and usually 

 encloses, in an excavation, a complicated and varied organ of copu- 

 lation; it is rarely Segestria exposed. 



With the exception of a few species, which enter into the genus 

 Mygale, they compose that of 



Aranea, Lin. Araneus of some authors. 



A first division will comprehe'nd the Aranea Sedentari^e, or seden- 

 tary spiders. They make webs, or throw out threads to ensnare 

 their prey, and always remain in these traps, or their vicinity, as 

 well as near their eggs. Their eyes are approximated anteriorly 

 and are sometimes eight in number, of which four or two are in the 

 middle and two or three on each side, and sometimes six. 



Some, which, from the circumstance of their always moving for- 

 wards, we term the Rectigrad^, weave webs and are stationary; 



(1) Dysdera erythrina, Lat.; Walck., Tab. des Aran., V, 49, 50; Dufour, Ann. 

 des Sc. Phys. V, lxxiii, 7; Aranea rufipes, Fab.; Dysdera parvula, Dufour, lb. 



(2) Filistata bicolor, Lat.; Walck., Faun. Franc, Arach., VI, 1 3. A moderate 

 sized species is found at Guadaloupe, the male of which has long and slender legs, 

 curved palpi, with the genital organs situated at the extremity of the last joint, 

 and terminated by a slender and arcuated, or falciform hook. 



