ORIODON. ARACHNIDES. 195 



Gen, 6. ORIODON, Lat. Missulena, Walck. 

 Lip linear, exserted between the maxillae ; palpi inserted at the 

 external base of the maxillae ; eyes disposed somewhat like 

 the letter H. 



O. occatorium, Lat. Body black, about an inch long. Inhabits New 

 Holland Lat. Gen. i. 86. 



Gen. 7- FILISTATA, Lat. 



Eyes placed on an uneven elevation, the four anterior ones form- 

 ing a semicircle, open in front ; the four posterior ones in 

 pairs in nearly the same line ; maxillae much inclined toward 

 the lip, with the palpi inserted on the lower side ; lip much 

 longer than broad ; fourth pair of feet larger than the first. 



F. bicolor, Lat. Pale yellow, with the abdomen, the extremity of 

 the palpi, and the feet blackish. Inhabits south of France and 

 Spain. 2VoMv. Diet. xi. 468. 



Gen. 8. DYSDKRA, Lat. 



Maxillae straight, longitudinal, with the base thickened, and di- 

 lated externally at the insertion of the palpi ; palpi with the 

 first joint short and nearly obsolete ; lip elongate, quadrate, 

 narrowing towards the point ; eyes arranged in a horse- shoe 

 form, open in front ; feet, the first pair longest, the third short- 

 est ; claws with a small brush beneath. 



D. erylhrina, Lat. Mandibles and thorax sanguineous ; abdomen 

 soft, grayish yellow, and silky. Inhabits south of France and Eng- 

 land, under stones. Sup. Encyc. Brit. i. pi. 23. 



II. DlPNEUMONES. 



With but one spiracle and one pulmonary sac on each side of 

 the abdomen ; six orifices for spinning, the four exterior in a 

 square form and two smaller in the middle. 



Some of the species of this family form webs or threads to surprise their prey. 

 Their eyes are approximated on the front, either eight in number, of which four or 

 two are in the middle and two or three on each side, or simply six. These are 

 commonly termed Sedentary Spiders. Those which form webs elevate their feet in 

 repose. 



FAMILY I. TUBITEL^. 



Orifices for spinning cylindrical, approximated, and in a bundle 

 directed backwards ; feet robust, the first two and last two, 

 or vice versa, the largest. 



Gen. 9. CLOTHO, Lat. Walck. 



Maxillae much inclined towards the lip, with no groove at the 



insertion of the palpi ; lip not much longer than broad ; feet 



with the fourth, the second, and then the third pair longest ; 



eyes approximated, disposed four and four in two lines, those 



'of the posterior line in pairs. 



C. Durandii, Lat. Thorax rusty brown, margined with pale yellow ; 



