ORDER PULMONARI^. 425 



more extended in the direction of the length of the corslet, 

 than in that of its breadth, or at least as much in one as the 

 other, and which form by their union, either a curvilinear 

 triangle, or an oval truncated, or a quadrilateral figure, com- 

 pose a second general division, the Erratic Spiders, 

 which I thus name in opposition to those of the first division, 

 or the Sedentary. 



Two, or four of their eyes, are often much larger than the 

 others ; the thorax is large, and the feet are robust ; those of 

 the fourth pair, the first two, or, after them, those of the 

 second pair, usually exceed the others in length. 



These spiders form no webs, watch their prey, seize it by 

 running, or by jumping on it. 



We shall divide them into two sections. 



The first, that of Citigrades, is composed of the Wolf- 

 Spiders of many writers. The eyes form, by their disposi- 

 tion, either a curvilinear triangle, or an oval, or quadrilateral 

 figure, but the anterior side of which is much narrower than 

 the thorax, measured in its greatest breadth. This part of 

 the body is ovoid, narrowed in front, and keel-formed in the 

 middle of its length ; the feet in general are proper only for 

 running; the jaws are always straight and rounded at the 

 end. 



The majority of the females remain upon the cocoon, or 

 even carry it along with them, applied against the breast, and 

 at the base of the belly, or suspended to the anus; they do 

 not abandon it but in extreme necessity, and return to seek 

 it when they have nothing more to fear; they also watch 

 during some time over the preservation of their young. 



OxYOPES, Latr., Sphasus, Walck. 



Which have the eyes ranged two by two, on four transverse 

 lines, and of which the two extreme are shorter ; they design 

 a sort of oval, truncated at both ends ; the tongue is elongated, 



