310 ARACHNIDKS 



The thorax of the others is much flattened, insensibly sloping at 

 its base. 



Sometimes their body is simply oval, and furnished with hairs or 

 thick down ; the legs short and robust. 



Salliqice chevronne ; Aranea scenica, h. ; Araignee a chev- 

 rons, Geoff.; Araignee a bandes blanches, De Geer, Insect., 

 VII, xvii, 8, 9. About two lines and a half long ; above, black ; 

 margin of the thorax, and three lines en chevron on the top of 

 the abdomen, white. Very common *. 



Sometimes the body is narrow, elongated, almost cylindrical and 

 shorn ; the legs long and slender. 



Salt. fGrmicarius ; Aranea formicaria, De Geer, Insect., VII, 

 xviii, ], 2; Afte fourmi, AValck., Faun. Fran9., Aran., V, 1 — 

 3. Reddish ; fore part of the thorax black ; black band and two 

 white spots on the abdomen f 



FAMILY II. 



PEDIPALPI. • 



In the second family of the Arachnides Pulmonarise, we find very 

 large palpi, resembling projecting arms, terminated by a forceps or a 

 claw ; didactyle cheliccrse, one finger of which is moveable ; an 

 abdomen composed of very distinct segments, without fusi at the 

 extremity ; and the sexual organs placed at the base of the abdomen. 

 The whole body is invested with a firm tegument ; the thorax con- 

 sists of a single piece, and exhibits three or two simple eyes, 

 approximated or grouped, near the anterior angles; and near the 

 middle of its anterior extremity, or posteriorly, but in the median 

 lino, two others equally simple and approximated. There are four 

 or eight pulmonary sacs. Those which form the genus 



Tarantula, Fab., 



Have their abdomen attached to their thorax by a pedicle, or por- 

 tion of their transverse diameter ; it has no pectinated laminae at its 

 base, nor sting at its extremity. Their stigmata, four in number, 

 are situated near the origin of the venter, and are covered with a 

 plate. Their chelicerae (mandibles) are simply terminated by a 



* Add, Attus tardigrudus, Walck., Hist, des Aran, V, iv, female. See his Tabl. 

 des Aran. 



f For the remaining species of this subgenus, see the Aran, of the Faune Fian- 

 (;aise. M. Walckenaer, author of that portion of the work, in his Tabl, des Aran., 

 mentions a species enclosed in amber. 



